JP6692284B2 - Instantaneous heart rate evaluation device, method and program - Google Patents

Description

  Embodiments of the present invention relate to an instantaneous heartbeat evaluation apparatus, method and program.

  There are two autonomic nerves, the sympathetic nerve and the vagus nerve. The sympathetic nerve and the vagus nerve are widely distributed in various organs, and control involuntary physical functions such as circulation and metabolism. In many cases, it is said that the sympathetic nerve and the vagus nerve antagonistically control one organ.

  It is known that sympathetic nerve activity, which is one of autonomic nerve activity, is enhanced by stress stimulation such as mental arithmetic load.

  On the other hand, vagal nerve activity, which is another autonomic nerve activity, is often understood to be equivalent to parasympathetic nerve activity, since the vagus nerve is mainly responsible for parasympathetic nerve activity in each organ. The vagus nerve is, strictly speaking, the name of the Xth nerve, which is one of the cranial nerves, and refers to all the nerves from the brain to each organ. Therefore, for example, by adding the name of the organ to be controlled, such as the cardiac vagus nerve, the parasympathetic nerve activity in the target organ may be indicated.

  The heart is one of the organs controlled by the autonomic nerves. The heart is antagonistically dominated by the sympathetic nerve and the vagus nerve, and is said to reflect the static balance between the sympathetic nerve activity and the vagus nerve activity (for example, see Non-Patent Document 2).

  FIG. 4 is a diagram showing an example of an instantaneous heartbeat (RRI). In particular, as shown in FIG. 4, fluctuations in an instantaneous heartbeat (RRI: RR interval), which is an interval between two R waves that are adjacent in time series (hereinafter sometimes simply referred to as “adjacent”), are caused by sympathetic nerve activity and vagus nerve. It is known to change with both activities. The R wave is one of the electrocardiographic waveforms obtained by electrocardiogram measurement, and reflects the depolarization activity of the heart (for example, see Non-Patent Document 3).

  An electrocardiogram cannot always be measured in a normal state. The abnormalities occurring in the electrocardiogram are roughly classified into (1) abnormalities in the measurement target (subject) and (2) abnormalities in the measurement system (measuring device). The abnormality of the measurement target refers to a lesion state such as arrhythmia of the subject. Further, the abnormality of the measurement system refers to a state where an abnormality occurs in a device used for measurement such as an electrode or a lead wire.

  Arrhythmia is a typical example of the abnormality to be measured. Arrhythmias are roughly classified into (1) tachycardia in which the interval of instantaneous heartbeats is shorter than in a normal state, and (2) bradycardia in which the interval of instantaneous heartbeats is longer than in a normal state.

  One of the means for measuring an electrocardiogram is a wearable device such as a Holter electrocardiograph. Electrocardiograms acquired by using these devices have abnormal measurement due to electrode abnormalities such as electrode deformation and displacement, or various factors such as body movement, sweating, and static electricity (for example, see Non-Patent Document 4). FIG. 5: is a figure which shows an example of the measurement abnormality in an electrocardiogram. This measurement abnormality can be confirmed in the form of noise (W1) or artifact (W2) (abnormal measurement state) as shown in FIG. 5 on the electrocardiogram.

  Among the measurement abnormalities, the waveform observed as an artifact is similar to the R wave, and one or more waveforms are continuously observed. Therefore, the algorithm that analyzes the electrocardiogram and extracts the R wave may erroneously determine the artifact as the R wave and unnecessarily extract it (hereinafter, such a waveform is referred to as a measurement abnormal R wave). To). The abnormal R wave of measurement does not reflect the depolarizing activity of the heart due to its generation mechanism. Therefore, if at least one of the R waves forming the instantaneous heartbeat is an abnormal measurement R wave, it can be said that the instantaneous heartbeat is erroneous.

  An electrocardiogram monitor (conventional method) is a typical system for detecting an abnormality in the electrocardiogram (see Non-Patent Document 1, for example). The electrocardiogram monitor is used for the purpose of detecting arrhythmias such as bradycardia and tachycardia to be measured, and if the instantaneous heart rate exceeds a lower limit value or an upper limit value within a certain time, it is judged as an abnormal electrocardiogram. And alarms are issued.

Daiki Sato, is the ECG monitor recall check important? Absolutely necessary? , Severe Intensive Care Vol.14, No.1, pp.3-9, 2015 Inoue Hiroshi, Cardiovascular Diseases and Autonomic Nervous Function 2nd Edition, Medical Institute, 2001 Okude Jun, I know this! Easy points electrocardiogram 2nd edition, medical school, 2011 Nihon Kohden, Mechanism and Countermeasures against Noise Mixing: Points to Record a Clean ECG-Halter ECG-, (Confirmed on October 6, 2016), http://www.nihonkohden.co.jp/iryo/point/holter/ mechanism.html Watanabe Shigeyuki et al., How to read ECG Perfect Manual, Yodosha, 2006

  The above-mentioned conventional method using the electrocardiogram monitor is based on the premise that the electrocardiogram is measured in a medical environment such as a hospital or using a medical device, and therefore abnormality of the measurement system is not basically considered (measurement For system abnormalities, the medical staff manually avoids it). Even if the conventional method is implemented in a wearable device, the ECG monitor cannot distinguish the instantaneous heartbeat including the abnormal measurement R wave from the pathologically abnormal instantaneous heartbeat, and therefore an appropriate alarm is issued for the pathologically abnormal instantaneous heartbeat. Difficult to report.

  For example, the electrocardiogram monitor may erroneously determine an electrocardiogram as a tachycardia when an abnormal R wave is continuously measured and issue an alarm, or may erroneously determine a bradycardia as an electrode is detached and issue an alarm. There is a fear.

  The present invention has been made in view of the above circumstances, and an object thereof is to distinguish between a waveform caused by an abnormality in a measurement system of an electrocardiogram and a waveform not caused by an abnormality, and an instantaneous heartbeat evaluation capable of realizing abnormality determination of the measurement system. An apparatus, an instantaneous heartbeat evaluation method, and a program are provided.

In order to achieve the above-mentioned object, the first aspect of the instantaneous heartbeat evaluation apparatus in the embodiment of the present invention determines an R wave of an electrocardiogram based on a signal output from an electrocardiographic measurement unit that measures an electrocardiogram of a subject. Extracting means for extracting, calculating means for calculating an instantaneous heartbeat which is an interval between two R waves adjoining in time series extracted by the extracting means, and two adjoining R waves extracted by the extracting means. An evaluation unit that evaluates the measurement state of the instantaneous heartbeat calculated by the calculation unit, which is the interval between the R waves, according to the type of each measurement state, and the measurement state of the R wave is the R wave. And a second measurement state of the R wave, wherein the first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying a condition, The second measurement state of the R wave is Is a normal measurement state in which the position does not satisfy the condition, and the measurement state of the instantaneous heartbeat includes a first measurement state of the instantaneous heartbeat and a second measurement state of the instantaneous heartbeat. The first measurement state indicates that the measurement states of the first and second R waves forming the instantaneous heartbeat are both the normal measurement states, and the second measurement state of the instantaneous heartbeat is There is provided an apparatus that indicates that at least one of a measurement state of a first R wave that constitutes the instantaneous heartbeat and a measurement state of a second R wave that constitutes the instantaneous heartbeat is the abnormal measurement state.

In a second aspect of the instantaneous heartbeat evaluation apparatus having the above configuration, in the first aspect, the measured state of the instantaneous heartbeat includes a first state section and a second state section, and the first state section is any measurement state of one and the other of R wave constituting the instantaneous heart rate calculated by the calculating means indicates that the normal measurement state, the second state segment, calculated by the previous SL calculating means There is provided an apparatus that indicates that at least one of a measurement state of a first R wave forming an instantaneous heartbeat and a measurement state of a second R wave forming the instantaneous heartbeat is the abnormal measurement state.

In order to achieve the above-mentioned object, the third aspect of the instantaneous heartbeat evaluating apparatus in the embodiment of the present invention determines the R wave of the electrocardiogram based on the signal output from the electrocardiographic measuring means for measuring the electrocardiogram of the subject. Extracting means for extracting, calculating means for calculating an instantaneous heartbeat which is an interval between two R waves adjoining in time series extracted by the extracting means, and two adjoining R waves extracted by the extracting means. An evaluation unit that evaluates the measurement state of the instantaneous heartbeat calculated by the calculation unit, which is the interval between the R waves, according to the type of each measurement state, and the measurement state of the R wave is the R wave. The first measurement state of R wave, the second measurement state of the R wave, and the third measurement state of the R wave, and the first measurement state of the R wave is such that the potential of the R wave satisfies the condition. It is an abnormal measurement state that The measurement state is noise in which the potential of the R wave does not have a magnitude that satisfies the above condition, but the fluctuation of the baseline of the R wave potential has a magnitude that satisfies the condition, and the third measurement state of the R wave is The abnormal measurement state and the normal measurement state that do not correspond to the noise, and the instantaneous heartbeat measurement state includes a first measurement state of the instantaneous heartbeat, a second measurement state of the instantaneous heartbeat, and a second measurement state of the instantaneous heartbeat. The third measurement state, the fourth measurement state of the instantaneous heartbeat, the fifth measurement state of the instantaneous heartbeat, and the sixth measurement state of the instantaneous heartbeat, and the first measurement state of the instantaneous heartbeat, Both the measurement states of the one and the other R waves that make up the instantaneous heartbeat indicate the normal measurement state, and the second measurement state of the instantaneous heartbeat indicates the one R wave that makes up the instantaneous heartbeat. The measurement state of is normal In the measurement state, the other measurement state indicates the noise, and the third measurement state of the instantaneous heartbeat indicates that the measurement states of the one and the other R waves constituting the instantaneous heartbeat are the noise. The fourth measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave constituting the instantaneous heartbeat is the normal measurement state and the other measurement state is the abnormal measurement state. The fifth measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave constituting the instantaneous heartbeat is the noise and the other measurement state is the abnormal measurement state. The sixth measurement state of No. 1 provides a device that indicates that the measurement states of the one and the other R waves constituting the instantaneous heartbeat are both the abnormal measurement state.

According to a fourth aspect of the instantaneous heartbeat evaluation apparatus having the above configuration, in the third aspect, the measurement state of the instantaneous heartbeat includes a first state section, a second state section, and a third state section, The first state classification indicates that the measurement states of the one and the other R waves constituting the instantaneous heartbeat calculated by the calculation means are both the normal measurement states, and the second state classification is ( 1) The measurement state of one R wave constituting the instantaneous heartbeat calculated by the calculation means is the normal measurement state, and the measurement state of the other R wave is the noise, or (2) the calculation The measurement state of one and the other R wave constituting the instantaneous heartbeat calculated by the means is the noise, and the third state classification is (1) the moment calculated by the calculation means. One of the Rs that make up the heartbeat The measurement state of R is the normal measurement state, and the measurement state of the other R wave is the abnormal measurement state, and (2) the measurement state of one R wave constituting the instantaneous heartbeat calculated by the calculating means. Is the noise, and the measurement state of the other R wave is the abnormal measurement state, or (3) the measurement state of the one and the other R waves constituting the instantaneous heartbeat calculated by the calculation means is Also, there is provided a device that indicates that the abnormal measurement state.

In order to achieve the above-mentioned object, a fifth aspect of the instantaneous heartbeat evaluation apparatus in the embodiment of the present invention determines an R wave of an electrocardiogram based on a signal output from an electrocardiographic measurement unit that measures an electrocardiogram of a subject. Extracting means for extracting, calculating means for calculating an instantaneous heartbeat which is an interval between two R waves adjoining in time series extracted by the extracting means, and two adjoining R waves extracted by the extracting means. An evaluation unit that evaluates the measurement state of the instantaneous heartbeat calculated by the calculation unit, which is the interval of the R waves, according to the type of each measurement state, and a signal output from the electrocardiography measurement unit within a fixed time. measurement conditions of the instantaneous heart rate was evaluated by the evaluation means in response to the, in the case satisfies the alarm the measurement state is not normal, the device for chromatic and alarm means for alarm that satisfies the conditions provide

A first aspect of the method for evaluating an instantaneous heartbeat according to the embodiment of the present invention is a method applied to an apparatus, in which R of the electrocardiogram is calculated based on a signal output from an electrocardiographic measurement unit that measures the electrocardiogram of the subject. Waves are extracted, an instantaneous heartbeat that is the interval between two adjacent R waves that are extracted in time series is calculated, and according to the type of each measurement state of the two adjacent R waves that are extracted, The calculated measurement state of the instantaneous heartbeat, which is the interval between the R waves, is evaluated, and the measurement state of the R wave includes a first measurement state of the R wave and a second measurement state of the R wave. The first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying the conditions, and the second measurement state of the R wave is the state of the potential of the R wave satisfying the above conditions. It is a normal measurement state that does not satisfy the size, and the measurement state of the instantaneous heartbeat is The 1st measurement state of the said instantaneous heartbeat and the 2nd measurement state of the said instantaneous heartbeat are included, The said 1st measurement state of the said instantaneous heartbeat of the 1st and 2nd R wave which comprises the said instantaneous heartbeat. Each of the measurement states indicates the normal measurement state, and the second measurement state of the instantaneous heartbeat is the measurement state of the first R wave forming the instantaneous heartbeat and the second measurement state of the instantaneous heartbeat. And a method for indicating that at least one of the R wave measurement states is the abnormal measurement state .
A second aspect of the method for evaluating an instantaneous heartbeat according to the embodiment of the present invention is a method applied to an apparatus, in which the R of the electrocardiogram is calculated based on a signal output from an electrocardiographic measurement unit that measures the electrocardiogram of the subject. Waves are extracted, an instantaneous heartbeat that is the interval between two adjacent R waves that are extracted in time series is calculated, and according to the type of each measurement state of the two adjacent R waves that are extracted, The measurement state of the calculated instantaneous heartbeat, which is the interval of the R wave, is evaluated, and the measurement state of the R wave is the first measurement state of the R wave, the second measurement state of the R wave, and the R state. The first measurement state of the R wave includes the third measurement state of the wave, and the first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying the condition, and the second measurement state of the R wave is While the potential of the R wave does not reach the magnitude that satisfies the above condition, Is a noise in which the fluctuation of the baseline becomes a magnitude that satisfies the condition, the third measurement state of the R wave is a normal measurement state that does not correspond to the abnormal measurement state and the noise, and the measurement state of the instantaneous heartbeat is A first measurement state of the instantaneous heartbeat, a second measurement state of the instantaneous heartbeat, a third measurement state of the instantaneous heartbeat, a fourth measurement state of the instantaneous heartbeat, a fifth measurement state of the instantaneous heartbeat, And the sixth measurement state of the instantaneous heartbeat, and the first measurement state of the instantaneous heartbeat is such that the measurement states of one and the other R waves constituting the instantaneous heartbeat are both the normal measurement states. The second measurement state of the instantaneous heartbeat indicates that one R wave forming the instantaneous heartbeat has the normal measurement state and the other measurement state has the noise. The third total of heartbeat The state indicates that the measurement states of one and the other R waves that make up the instant heartbeat are the noises, and the fourth measurement state of the instant heartbeat makes one of the R waves that make up the instant heartbeat. It is shown that the measurement state of the wave is the normal measurement state and the other measurement state is the abnormal measurement state, and the fifth measurement state of the instantaneous heartbeat is measurement of one R wave constituting the instantaneous heartbeat. The state indicates the noise, and the other measurement state indicates the abnormal measurement state, and the sixth measurement state of the instantaneous heartbeat indicates that the measurement state of one and the other R wave constituting the instantaneous heartbeat is Also provides a method of indicating the abnormal measurement state.
A third aspect of the method for evaluating an instantaneous heartbeat in the embodiment of the present invention is a method applied to an apparatus, in which the R of the electrocardiogram is calculated based on a signal output from an electrocardiographic measuring unit that measures the electrocardiogram of the subject. Waves are extracted, an instantaneous heartbeat that is the interval between two adjacent R waves that are extracted in time series is calculated, and according to the type of each measurement state of the two adjacent R waves that are extracted, The calculated measurement state of the instantaneous heartbeat, which is the interval between the R waves, is evaluated, and the evaluated measurement state of the instantaneous heartbeat is not normal according to the signal output from the electrocardiographic measurement means within a certain period of time. Provided is a method of reporting that the condition is satisfied when the condition for reporting the measurement state is satisfied.

Aspect of the instantaneous heartbeat evaluation program according to the embodiment of the present invention, first, a program used in a computer that operates as part of the instantaneous heart rate evaluation device according to any one of the third and fifth aspects, the the computer provides a program for causing the function as each hand stage.

  According to the present invention, it is possible to distinguish between a waveform that is caused by an abnormality in the measurement system of an electrocardiogram and a waveform that is not caused by the abnormality, and it is possible to realize abnormality determination of the measurement system.

The figure which shows the structural example of the instantaneous heartbeat evaluation apparatus in embodiment of this invention. The flowchart which shows an example of the processing procedure by the instantaneous heartbeat evaluation apparatus in embodiment of this invention. The figure which shows an example of the relationship of the absolute value of the electric potential amplitude of a QRS group, and the electric potential of R wave. The figure which shows an example of an instantaneous heartbeat (RRI). The figure which shows an example of the measurement abnormality in an electrocardiogram.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In one embodiment, the abnormality determination is performed by evaluating the measurement status of the instantaneous heartbeat based on the potential information of the two R waves forming the instantaneous heartbeat. In addition, in the evaluation of the instantaneous heartbeat, conventional time information may be considered in addition to the potential information.

(Constitution)
FIG. 1 is a diagram showing a configuration example of an instantaneous heartbeat evaluation apparatus according to an embodiment of the present invention. The instantaneous heartbeat evaluation apparatus 10 shown in FIG. 1 includes an electrocardiogram measurement unit 11 and an instantaneous heartbeat evaluation unit 12. As an example, in the instantaneous heartbeat evaluation apparatus 10, the electrocardiogram measurement unit 11 is a wearable device that can be worn by a subject (user), and the instantaneous heartbeat evaluation unit 12 is a computer device such as a smartphone, a tablet terminal, or a personal computer (PC). It is realized by the system. For example, the computer device includes a processor such as a CPU (Central Processing Unit), a memory connected to the processor, and a communication interface for communicating (for example, wirelessly) with the electrocardiogram measurement unit 11. Note that the implementation form of the instantaneous heartbeat evaluation apparatus 10 is not limited to this example. For example, the instantaneous heartbeat evaluation apparatus 10 may be realized as one device. Further, the electrocardiogram measurement unit 11 may be provided outside the instantaneous heartbeat evaluation device 10. In other words, the instantaneous heartbeat evaluation device 10 may acquire the result of measuring the electrocardiogram of the subject from an external electrocardiographic measurement device corresponding to the electrocardiogram measurement unit 11.
The difference between the embodiment and the conventional technique is that the measurement state of the instantaneous heartbeat is evaluated based on the potential information of the two R waves forming the instantaneous heartbeat, not the time information of the instantaneous heartbeat.

  The electrocardiogram measurement unit 11 measures the electrocardiogram of the subject and sends the measurement result to the instantaneous heartbeat evaluation unit 12. The electrocardiogram is a biological signal of the circulatory system and includes, for example, a periodic signal synchronized with the contraction of the ventricle. The electrocardiogram measurement unit 11 measures electrocardiogram with at least two electrodes. The measurement result includes data capable of extracting the electrocardiogram corresponding to the R wave in the electrocardiogram. For example, the measurement result includes electrocardiographic data. It suffices that the electrocardiogram measurement unit 11 be capable of measuring an electrocardiographic waveform equivalent to the R wave, and the implementation thereof does not matter. For example, the electrocardiogram measurement unit 11 includes a Holter electrocardiograph.

  The instantaneous heartbeat evaluation unit 12 receives the measurement result from the electrocardiogram measurement unit 11 and evaluates the subject's instantaneous heartbeat based on the received measurement result. For example, the instantaneous heartbeat evaluation unit 12 includes the R wave extraction unit 121, the R wave related information recording unit 122, the instantaneous heartbeat calculation unit 123, the instantaneous heartbeat recording unit 124, the measurement state evaluation unit 125, and the measurement state feedback unit (reporting unit). 126 and a feedback condition recording unit 127.

  The functions of the R wave extraction unit 121, the R wave related information recording unit 122, the instantaneous heartbeat calculation unit 123, the instantaneous heartbeat recording unit 124, the measurement state evaluation unit 125, the measurement state feedback unit 126, and the feedback condition recording unit 127 are, for example, a processor. Is realized by reading and executing the program stored in the memory. Note that some or all of these functions may be realized by a circuit such as an application specific integrated circuit (ASIC).

  The R wave extraction unit 121 analyzes the electrocardiogram acquired by the electrocardiogram measurement unit 11 and extracts the R wave. The R wave extraction unit 121 also records the extracted R wave information in the R wave related information recording unit 122.

  The R-wave related information recording unit 122 includes a storage medium such as a non-volatile memory, and records the R-wave information extracted by the R-wave extraction unit 121 in the storage medium. In the present embodiment, as the R-wave measurement state, information that allows at least two types of measurement states, that is, a normal measurement state and an artifact, to be discriminated is recorded in the R-wave related information recording unit 122, but other information is recorded. Is not specified. For example, in addition to the normal measurement state and artifacts, noise may be recorded, or information on the time when the extracted R wave appears may be recorded in the R wave related information recording unit 122. The specific recording format is not specified.

  The instantaneous heartbeat calculating unit 123 calculates an instantaneous heartbeat that is the interval between two adjacent R waves based on the R wave extracted by the R wave extracting unit 121. The instantaneous heartbeat calculating unit 123 records information on the calculated instantaneous heartbeat in the instantaneous heartbeat recording unit 124.

  The instantaneous heartbeat recording unit 124 includes a storage medium such as a non-volatile memory, and records the information of the instantaneous heartbeat calculated by the instantaneous heartbeat calculating unit 123 in the storage medium. Although a specific recording format for the instantaneous heartbeat recording unit 124 is not particularly specified, for example, (1) a matrix of instantaneous heartbeats, (2) time information of the first R wave forming the instantaneous heartbeats and the instantaneous heartbeats. And a data matrix composed of two.

  The function of the instantaneous heartbeat recording unit 124 is not an essential function in this embodiment. This function is necessary only when the measurement state of the electrocardiogram is evaluated in consideration of the time information of the instantaneous heartbeat in addition to the potential information of the R wave.

  The measurement state evaluation unit 125 evaluates the measurement state of the instantaneous heartbeat based on the information recorded in the R wave related information recording unit 122. A specific evaluation method will be described in an operation example described later.

  When the measurement state evaluation unit 125 evaluates that the measurement state of the instantaneous heartbeat is not normal, the measurement state feedback unit 126 provides feedback to the user by using an alarm report or the like. The processing by the measurement state feedback unit 126 is indispensable for providing feedback to the user, but may not be necessarily provided only when evaluating the measurement state and not providing feedback to the user. Note that the method for realizing feedback is not particularly limited.

  The feedback condition recording unit 127 includes a storage medium such as a non-volatile memory, and records a condition (feedback condition (alarm condition)) for performing feedback (alarm reporting) by the measurement state feedback unit 126 on this recording medium. To do. For example, the feedback condition recording unit 127 records the measurement state to be fed back, the duration of the measurement state, and the like. The conditions for performing feedback may be one or more conditions for performing feedback by the measurement state feedback unit 126. In this embodiment, details of information to be recorded in the feedback condition recording unit 127 are not particularly limited.

(Operation example)
Next, an operation example of the embodiment will be described. In this embodiment, as an example of the measurement state of the R wave, a case where three types of artifacts, noise, and a normal measurement state are considered is assumed, and a case of recording the potential information of the R wave will be described. Also, two types of artifacts and normal measurement states may be considered without considering noise. In the following, a case where the instantaneous heartbeat is evaluated using only the potential information will be described.

The specific processing procedure is shown below. FIG. 2 is a flowchart showing an example of a processing procedure by the instantaneous heartbeat evaluating apparatus according to the embodiment of the present invention.
The electrocardiogram measurement unit 11 measures the electrocardiogram with at least two electrodes (S1).
The R wave extraction unit 121 extracts the R wave from the electrocardiogram measured by the electrocardiogram measurement unit 11. The R wave extraction unit 121 records the extracted potential information of each R wave in the R wave related information recording unit 122.

  The instantaneous heartbeat calculating unit 123 calculates an instantaneous heartbeat from two adjacent R waves based on the R wave extracted by the R wave extracting unit 121 (S2). The instantaneous heartbeat calculating unit 123 records the calculated instantaneous heartbeat information in the instantaneous heartbeat recording unit 124 only when the measurement state of the instantaneous heartbeat is evaluated in consideration of the time information of the instantaneous heartbeat.

  The measurement state evaluation unit 125 evaluates the measurement state of the instantaneous heartbeat based on the R wave potential information recorded in the R wave related information recording unit 122. Note that the measurement state evaluation unit 125 may evaluate the measurement state of the instantaneous heartbeat using another reference instead of the potential information of the R wave, as long as the same evaluation can be performed. For example, the measurement state evaluation unit 125 performs the abnormality determination of the measurement state based on the statistical information of the electrocardiogram, and the measurement state of the instantaneous heartbeat based on the information obtained by combining the result of the abnormality determination and the information of the measured R wave. May be evaluated.

  An example of evaluation of the measurement state of the instantaneous heartbeat will be described. In the present embodiment, the measurement state evaluation unit 125 determines three types of measurement states of a normal measurement state, noise, and an artifact as R wave measurement states based on the potential information of the two R waves forming the instantaneous heartbeat. ..

  In the present embodiment, the internal memory (not shown) of the measurement state evaluation unit 125 stores the evaluation standard of the measurement state of the R wave described in Table 1 below, and the measurement state evaluation unit 125 uses the evaluation standard. Based on, it is determined whether or not the measurement state of the R wave is an artifact (S3).

  The measurement state evaluation unit 125 determines whether or not the measurement state of the R wave that is determined to be not an artifact in S3 is noise (a waveform in which the baseline of the potential changes by a certain amount or more compared to the normal measurement state). (S4). As for this discrimination, any means can be used as long as it can detect the baseline fluctuation.

  In the present embodiment, the measurement state evaluation unit 125 uses the potential of the R wave to be discriminated (the tip of the arrow in FIG. 3) and the absolute value of the potential amplitude of the QRS complex (electrocardiogram) including the R wave to be discriminated. When (see FIG. 3) exceeds the threshold value, the R wave is determined as noise. In this embodiment, this threshold is assumed to be 0.5 mV. FIG. 3 is a diagram showing an example of the relationship between the absolute value of the potential amplitude of the QRS complex and the potential of the R wave.

The measurement state evaluation unit 125 determines that the measurement state of the R wave that has not been determined to be an artifact or noise in S3 and S4 is a normal measurement state (S5).
The measurement state evaluation unit 125 evaluates the measurement state of the instantaneous heartbeat composed of two adjacent R waves based on the measurement state determined for each R wave (S6). When considering three types of normal measurement state, noise, and artifact, the combination of the determination results of the measurement state of the R wave that constitutes the instantaneous heartbeat is one of the patterns shown by serial numbers # 1 to # 9 shown in Table 2 below. It becomes The format of the serial number is not limited to the above.

  “R” of the determination result in Table 2 indicates a normal measurement state, “N” indicates noise, and “A” indicates an artifact. That is, "R, R" of the determination result corresponding to the serial number # 1 in Table 2 indicates that the determination results of the adjacent first and second R-wave measurement states are both normal measurement states. “R, N” of the determination result corresponding to the serial number # 2 in Table 2 indicates that the determination result of the measurement state of the adjacent first R wave is normal and the determination result of the measurement state of the second R wave is Indicates that is noise. In the determination result “N, R” corresponding to the serial number # 3 in Table 2, the determination result of the measurement state of the adjacent first R wave is noise, and the determination result of the measurement state of the second R wave is Indicates a normal state. “N, N” of the discrimination result corresponding to the serial number # 4 in Table 2 indicates that the discrimination results of the measurement states of the first and second adjacent R waves are both noise.

  “R, A” of the determination result corresponding to the serial number # 5 in Table 2 indicates that the determination result of the measurement state of the adjacent first R wave is normal and the determination result of the measurement state of the second R wave is Indicates that is an artifact. In “A, R” of the determination result corresponding to the serial number # 6 in Table 2, the determination result of the measurement state of the adjacent first R wave is an artifact, and the determination result of the measurement state of the second R wave is Indicates a normal state. In “N, A” of the determination result corresponding to the serial number # 7 in Table 2, the determination result of the measurement state of the adjacent first R wave is noise, and the determination result of the measurement state of the second R wave is Indicates an artifact. In “A, N” of the determination result corresponding to the serial number # 8 in Table 2, the determination result of the measurement state of the adjacent first R wave is an artifact and the determination result of the measurement state of the second R wave is Indicates noise. “A, A” of the discrimination result corresponding to the serial number # 9 in Table 2 indicates that the discrimination results of the measurement states of the first and second adjacent R waves are both artifacts.

“Details of state” in Table 2 indicates details of measurement states of two adjacent R waves based on the determination result of the same row in Table 2.
In the expression "details of state", only the combination of the determination results of the measurement states of the two R waves forming the instantaneous heartbeat is distinguished, and the front and rear of the time series are not distinguished. That is, in the example shown in Table 2, there are nine combinations of measurement state determination results corresponding to serial numbers # 1 to # 9, but the “details of state” corresponding to # 2 and # 3 are the same “one side”. Is a normal measurement state, the other is noise, and the "details of states" corresponding to # 5 and # 6 are the same "one is a normal measurement state, the other is an artifact", and the "state of “Details” is the same “one is noise and the other is artifact”. Therefore, there are six “details of states” in Table 2.

  The measurement state evaluation unit 125 assigns at least one kind of separate evaluation information to each state so that the “details of state” can be easily distinguished in the determination of necessity of feedback described later. As an example of the evaluation information, an example of using two kinds of evaluation information of “state name” and “state classification” shown in Table 2 will be described.

  Next, the “state name” in Table 2 will be described. This “state name” is a state represented by “details of state” in the same row in Table 2 and represents the measurement states of the two R waves forming the instantaneous heartbeat by two letters of the alphabet. .. Similar to the R wave discrimination state, in Table 2, “R” is used when the measurement state of a certain R wave indicates a normal measurement state, “N” is used when it indicates noise, and when an artifact is indicated. "A" is used for.

For example, as shown in Table 2, when the "details of state" in serial number # 1 is "both are normal measurement states", the "state name" in serial number # 1 is "RR".
Further, like the expression of “details of status”, the expression of “status name” distinguishes only the combination of the determination results of the measurement statuses of the two R waves forming the instantaneous heartbeat, and does not distinguish before and after the time series. That is, as shown in Table 2, the "discrimination result" for the serial number # 2 is "R, N", and the "discrimination result" for the serial number # 3 is "N, R" in which the front and back of the time series are interchanged. On the other hand, the "details of state" in these serial numbers # 2 and # 3 are common "one is a normal measurement state, the other is noise", and the "state name" in these serial numbers # 2 and # 3 is common. It is "RN".
The “state details” in serial number # 4 is “two noise”, and the “state name” in serial number # 4 is “NN”.

  The "details of state" in the serial numbers # 5 and # 6 are common "one is a normal measurement state, the other is an artifact", and the "state name" in these serial numbers # 5 and # 6 is a common "RA". is there.

The “details of state” in the serial numbers # 7 and # 8 are common “one is noise and the other is artifact”, and the “state name” in these serial numbers # 7 and # 9 is the common “NA”.
The "details of state" in the serial number # 9 is "two artifacts", and the "state name" in the serial number # 9 is "AA".

  Next, the “state classification” in Table 2 will be described. This "state classification" is a representation of the instantaneous heartbeat measurement state divided into "normal", "quasi-normal", and "abnormal" according to the type of "state name" in the same row in Table 2. ..

  Here, "normal" is used as the "state classification" only when the two-letter alphabets indicated by the "state name" are both "R". Further, when the alphabet indicated by "state name" is "RN" or "NN", that is, at least one of the two alphabets includes "N", but the two alphabets do not include "A". "Quasi-normal" is used as the "state classification". If the two-letter alphabet indicated by "state name" is "RA", "NA", or "AA", that is, if at least one of the two-letter alphabets is "A", the "state classification" is " "Abnormal" is used.

For example, as shown in Table 2, when the "state name" in the serial number # 1 is "RR", the "state classification" in the serial number # 1 is "normal".
The “state name” in serial numbers # 2 and # 3 is “RN” and the “state name” in serial number # 4 is “NN”, whereas the “state” in serial numbers # 2, # 3, and # 4 is The “category” is the common “quasi-normal”.

  Further, the "state name" in the serial numbers # 5 and # 6 is "RA", the "state name" in the serial numbers # 7 and # 8 is "NA", and the "state name" in the serial number # 9 is "AA". On the other hand, the "state classification" in the serial numbers # 5, # 6, # 7, # 8, and # 9 is a common "abnormal".

  Note that the types of evaluation information described above are merely examples, and the method of determining evaluation information is not particularly limited. For example, for the “details of the state”, the evaluation information may be set such that the information indicating the relationship before and after two adjacent R waves can be easily discriminated by the user. The above evaluation information may be set.

As shown in Table 2, the measurement state evaluation unit 125 generates information capable of distinguishing the “state details”, the “state name”, and the “state classification” of the measurement state of the instantaneous heartbeat configured by the R wave. In the present embodiment, the measurement state evaluation unit 125 generates information in which the above “details of state”, “state name”, and “state classification” are associated using serial numbers (# 1, # 2, ...). Store in internal memory.
Then, the measurement state evaluation unit 125, among the R waves shown in the information shown in Table 2 and the information recorded in the R wave related information recording unit 122, the two of the R heart waves that form the instantaneous heartbeat calculated by the instantaneous heartbeat calculation unit 123 By collating with the determination result of the measurement state of the R wave, the corresponding "details of state", "state name", and "state classification" are identified from the information shown in Table 2, and the identified result is It is obtained as an evaluation result of the measurement state of the instantaneous heartbeat calculated by the instantaneous heartbeat calculating unit 123 (S6).

  The measurement state feedback unit 126 collates the evaluation result of the measurement state evaluation unit 125 with the information recorded in the feedback condition recording unit 127, and based on the result of the collation, feeds back the measurement state of the instantaneous heartbeat. (S7).

  As an example of the feedback condition, it is assumed that the following (1) first alarm condition and (2) second alarm condition shown below are recorded in the feedback condition recording unit 127, and the measurement state feedback unit 126 displays For each example, calculate the ratio of each measurement state (“state name” or “state category”) evaluated for the instantaneous heartbeat based on the electrocardiogram measured within this fixed time, and determine the feedback necessity. State. The state of the alarm target and the proportion of the instantaneous heartbeat of a predetermined type evaluated with respect to the electrocardiogram measured in 30 seconds, which are defined in this example, are examples, and details thereof are not defined in the present invention.

(1) First Alarm Condition The first alarm condition is (1-1) to (1-4) below.

(1-1) Status classification (status name) to be fed back: "abnormal" (any of status names "RA", "NA", and "AA")
(1-2) Detection conditions: 15% or more of the instantaneous heartbeats evaluated for the electrocardiogram measured in 30 seconds correspond to (1-1). (1-3) Feedback means: (1- If 2) is satisfied, an audio alarm is issued (1-4) Priority: High (higher than the second alarm condition)
(2) Second alarm condition The second alarm condition consists of the following (2-1) to (2-4).

(2-1) State name that is the feedback target: "NN"
(2-2) Detection condition: The state name of 15% of the instantaneous heartbeat evaluated for the electrocardiogram measured in 30 seconds corresponds to (2-1). (2-3) Feedback means: (2-2 (2-4) Priority: Medium (lower than the first alarm condition)
The measurement state feedback unit 126, every 30 seconds, the ratio of each state name or each state segment of the instantaneous heartbeat evaluated for the electrocardiogram measured in the 30 seconds, that is, (a) the evaluated instantaneous heartbeat in 30 seconds. Of the instantaneous heartbeats corresponding to each of the state names "RR", "RN", "NN", "RA", "NA", and "AA", or (b) evaluated for 30 seconds. The ratio of the instantaneous heartbeats corresponding to each of the status categories “normal”, “quasi-normal”, and “abnormal” with respect to the entire instantaneous heartbeats is calculated.

  The measurement state feedback unit 126 first makes a determination using the first alarm condition having a high priority, according to the priority determined by each alarm condition. Specifically, the measurement state feedback unit 126 determines that 15% or more of the evaluated instantaneous heartbeats in 30 seconds are “abnormal”, that is, the evaluated instantaneous heartbeat number in 30 seconds is 100%. On the other hand, the total ratio of the instantaneous heartbeats whose state name was evaluated as "RA", the instantaneous heartbeats whose state name was evaluated as "NA", and the instantaneous heartbeats whose state name was evaluated as "AA" during this 30 seconds. If the value is 15% or more, an alarm is sounded.

  When the first alarm condition is not satisfied, the measurement state feedback unit 126 shifts to the determination using the second alarm condition. Specifically, the measurement state feedback unit 126 sets the state name of 15% or more of the evaluated instantaneous heartbeats for 30 seconds as "NN", when the evaluated instantaneous heartbeat rate for 30 seconds is 100%. If it is, an alarm is sounded.

Further, when considering two types of measurement states of each R wave without considering noise, that is, an artifact and a normal measurement state, the determination result of the measurement state of each R wave in Table 2 is “R, R”, There are four types of “R, A”, “A, R”, and “A, A”, and “Details of state” are (1) “Both are normal measurement states” corresponding to the determination result “R, R”. Further, (2) the determination results “R, A”, “A, R”, and “A, A” may be two types of “at least one is an artifact”.
In this case, the state name corresponding to "both normal measurement states" of "state details" is set to "RR", and the state name corresponding to "at least one is an artifact" of "state details" is set to "RA". can do.
Further, the status classification corresponding to the status name "RR" can be set to "normal", and the status classification corresponding to the status name "RA" can be set to "abnormal".

Next, effects produced by the present invention will be described.
In the present invention, by evaluating the measurement state of the instantaneous heartbeat based on the potential information of the R wave, it is possible to distinguish between the abnormality of the measurement target (subject) and the abnormality of the measurement system (measuring device).

  Usually, even when the electrocardiogram of the measurement target includes an abnormal electrocardiogram, the potential of the R wave measured for the measurement target remains normal. On the other hand, when an abnormality occurs in the measurement system (measuring device), the measured R-wave potential is not normal. From this, by combining the technique shown in the present embodiment and the conventional technique, it is possible to separately determine the abnormality of the measurement target and the abnormality of the measurement system, and to determine the necessity of feedback.

  Further, in the present invention, as shown in the embodiment, it is also possible to evaluate the abnormal stage of the measurement state by setting a plurality of types of measurement states of the instantaneous heartbeat and a plurality of types of feedback conditions. Therefore, the necessity of feedback can be determined with high accuracy.

  Especially in wearable devices, measurement of an artifact is often performed after measurement of a waveform determined to be noise. From this, for example, by feeding back that the measurement state of the R wave forming the instantaneous heartbeat is noise, it is possible to prevent the measurement state of the R wave forming the instantaneous heartbeat from falling into an artifact. It will be possible.

  Further, according to the present invention, even after the measurement state feedback unit 126 has issued an alarm once, it is possible to continuously determine the measurement abnormality. Therefore, the countermeasure implemented by the administrator after the alarm is issued is effective. Can be confirmed. For example, after the alarm is issued according to the evaluation result of the instantaneous heartbeat and the alarm condition in the previous 30 seconds, the measurement state feedback unit 126 performs an arbitrary operation after the administrator takes measures such as shifting the electrodes of the measuring device. By collating the evaluation result of the instantaneous heartbeat for 30 seconds with the alarm condition again, it is possible to confirm whether the countermeasure was correct.

  The invention of the present application is not limited to the above-described embodiment, and can be variously modified in an implementation stage without departing from the scope of the invention. Further, the respective embodiments may be combined as appropriate as much as possible, in which case the combined effects can be obtained. Further, the embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the section of the problem to be solved by the invention can be solved, and the effect described in the section of the effect of the invention When the above is obtained, the configuration in which this constituent element is deleted can be extracted as the invention.

  In addition, the method described in each embodiment is, for example, a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM,) as a program (software means) that can be executed by a computer (computer). It can also be stored in a recording medium such as a DVD, MO, etc.), a semiconductor memory (ROM, RAM, flash memory, etc.), or transmitted by a communication medium for distribution. It should be noted that the programs stored on the medium side also include setting programs for configuring software means (including not only execution programs but also tables and data structures) to be executed by the computer in the computer. A computer that realizes the present apparatus reads a program recorded in a recording medium, constructs software means by a setting program in some cases, and executes the above-described processing by controlling the operation by the software means. It should be noted that the recording medium referred to in the present specification is not limited to distribution, but includes a storage medium such as a magnetic disk or a semiconductor memory provided in a device inside a computer or a device connected via a network.

  10 ... Instantaneous heartbeat evaluation device, 11 ... Electrocardiogram measurement unit, 12 ... Instantaneous heartbeat evaluation unit, 121 ... R wave extraction unit, 122 ... R wave related information recording unit, 123 ... Instantaneous heartbeat calculation unit, 124 ... Instantaneous heartbeat recording unit, 125 ... Measurement state evaluation unit, 126 ... Measurement state feedback unit, 127 ... Feedback condition recording unit.

Claims (9)

Extraction means for extracting the R wave of the electrocardiogram based on the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject;
Calculating means for calculating an instantaneous heartbeat, which is the interval between two R waves adjacent in time series, extracted by the extracting means;
Evaluation means for evaluating the measurement state of the instantaneous heartbeat calculated by the calculation means, which is the interval between the R waves extracted by the extraction means, according to the type of each measurement state of the two adjacent R waves. Equipped with
The measurement state of the R wave includes a first measurement state of the R wave and a second measurement state of the R wave,
The first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying a condition,
The second measurement state of the R wave is a normal measurement state in which the potential of the R wave does not have a magnitude that satisfies the above condition,
The measurement state of the instantaneous heartbeat includes a first measurement state of the instantaneous heartbeat and a second measurement state of the instantaneous heartbeat,
The first measurement state of the instantaneous heartbeat indicates that the measurement states of the first and second R waves forming the instantaneous heartbeat are both the normal measurement state,
In the second measurement state of the instantaneous heartbeat, at least one of the measurement state of the first R wave forming the instant heartbeat and the measurement state of the second R wave forming the instantaneous heartbeat is the abnormal measurement state. It is shown to the instantaneous heart rate evaluation device that there is. The measurement state of the instantaneous heartbeat includes a first state section and a second state section,
The first state classification indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat calculated by the calculation means are both normal measurement states,
The second state segment, at least one of the abnormality of the second measurement state of the R wave which constitutes the first measurement condition and the instantaneous heart rate of the R-wave which constitutes the instantaneous heart rate calculated by the previous SL calculating means to indicate that it is a measurement state, the instantaneous heartbeat evaluation apparatus according to claim 1. Extraction means for extracting the R wave of the electrocardiogram based on the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject;
Calculating means for calculating an instantaneous heartbeat, which is the interval between two R waves adjacent in time series, extracted by the extracting means;
Evaluation means for evaluating the measurement state of the instantaneous heartbeat calculated by the calculation means, which is the interval between the R waves extracted by the extraction means, according to the type of each measurement state of the two adjacent R waves. Equipped with
The R-wave measurement state includes a first measurement state of the R-wave, a second measurement state of the R-wave, and a third measurement state of the R-wave,
The first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying a condition,
The second measurement state of the R wave is noise in which the potential of the R wave does not have a magnitude that satisfies the condition, while the variation of the baseline of the R wave potential has a magnitude that satisfies the condition,
The third measurement state of the R wave is a normal measurement state that does not correspond to the abnormal measurement state and the noise,
The measurement state of the instantaneous heartbeat includes a first measurement state of the instantaneous heartbeat, a second measurement state of the instantaneous heartbeat, a third measurement state of the instantaneous heartbeat, a fourth measurement state of the instantaneous heartbeat, the moment Including a fifth measurement state of the heartbeat and a sixth measurement state of the instantaneous heartbeat,
The first measurement state of the instantaneous heartbeat indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat are both normal measurement states,
The second measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave constituting the instantaneous heartbeat is the normal measurement state and the other measurement state is the noise,
The third measurement state of the instantaneous heartbeat indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat are both the noise,
The fourth measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave that constitutes the instantaneous heartbeat is the normal measurement state, and the other measurement state is the abnormal measurement state,
The fifth measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave constituting the instantaneous heartbeat is the noise and the other measurement state is the abnormal measurement state,
The sixth measurement state of the instantaneous heart rate indicates to the instantaneous heart rate evaluation device that measures the state of one and the other of R wave constituting the instantaneous heart rate are both said abnormal measurement state. The measurement state of the instantaneous heartbeat includes a first state section, a second state section, and a third state section,
The first state classification indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat calculated by the calculation means are both normal measurement states,
In the second state classification, (1) the measurement state of one R wave constituting the instantaneous heartbeat calculated by the calculation means is the normal measurement state, and the measurement state of the other R wave is the noise. Or (2) the measurement state of one and the other R wave constituting the instantaneous heartbeat calculated by the calculation means is the noise,
In the third state classification, (1) the measurement state of one R wave constituting the instantaneous heartbeat calculated by the calculation means is the normal measurement state, and the measurement state of the other R wave is the abnormal measurement. (2) The measurement state of one R wave constituting the instantaneous heartbeat calculated by the calculation means is the noise, and the measurement state of the other R wave is the abnormal measurement state, Alternatively, (3) the instantaneous heartbeat evaluation apparatus according to claim 3 , wherein the measurement states of one and the other R waves constituting the instantaneous heartbeat calculated by the calculation means are both abnormal measurement states. Extraction means for extracting the R wave of the electrocardiogram based on the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject;
Calculating means for calculating an instantaneous heartbeat, which is the interval between two R waves adjacent in time series, extracted by the extracting means;
Evaluation means for evaluating the measurement state of the instantaneous heartbeat calculated by the calculation means, which is the interval between the R waves extracted by the extraction means, according to the type of each measurement state of the two adjacent R waves. ,
When the measurement state of the instantaneous heartbeat evaluated by the evaluation unit according to the signal output from the electrocardiographic measurement unit within a certain time satisfies the condition of reporting an abnormal measurement state, the condition is satisfied. instant heart rate evaluation apparatus example Bei and alarm means to alarm that. A method applied to a device,
The R wave of the electrocardiogram is extracted on the basis of the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject,
Calculating the extracted instantaneous heartbeat, which is the interval between two adjacent R waves in time series,
Evaluating the calculated measurement state of the instantaneous heartbeat, which is the interval between the R waves, according to the type of the respective measurement states of the two adjacent R waves that are extracted ,
The measurement state of the R wave includes a first measurement state of the R wave and a second measurement state of the R wave,
The first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying a condition,
The second measurement state of the R wave is a normal measurement state in which the potential of the R wave does not have a magnitude that satisfies the above condition,
The measurement state of the instantaneous heartbeat includes a first measurement state of the instantaneous heartbeat and a second measurement state of the instantaneous heartbeat,
The first measurement state of the instantaneous heartbeat indicates that the measurement states of the first and second R waves forming the instantaneous heartbeat are both the normal measurement state,
In the second measurement state of the instantaneous heartbeat, at least one of the measurement state of the first R wave forming the instant heartbeat and the measurement state of the second R wave forming the instantaneous heartbeat is the abnormal measurement state. An instantaneous heart rate evaluation method that indicates that there is. A method applied to a device,
The R wave of the electrocardiogram is extracted on the basis of the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject,
Calculating the extracted instantaneous heartbeat, which is the interval between two adjacent R waves in time series,
Evaluating the calculated measurement state of the instantaneous heartbeat, which is the interval between the R waves, according to the type of the respective measurement states of the two adjacent R waves that are extracted ,
The R-wave measurement state includes a first measurement state of the R-wave, a second measurement state of the R-wave, and a third measurement state of the R-wave,
The first measurement state of the R wave is an abnormal measurement state in which the potential of the R wave has a magnitude satisfying a condition,
The second measurement state of the R wave is noise in which the potential of the R wave does not have a magnitude that satisfies the condition, while the variation of the baseline of the R wave potential has a magnitude that satisfies the condition,
The third measurement state of the R wave is a normal measurement state that does not correspond to the abnormal measurement state and the noise,
The measurement state of the instantaneous heartbeat includes a first measurement state of the instantaneous heartbeat, a second measurement state of the instantaneous heartbeat, a third measurement state of the instantaneous heartbeat, a fourth measurement state of the instantaneous heartbeat, the moment Including a fifth measurement state of the heartbeat and a sixth measurement state of the instantaneous heartbeat,
The first measurement state of the instantaneous heartbeat indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat are both normal measurement states,
The second measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave that constitutes the instantaneous heartbeat is the normal measurement state and the other measurement state is the noise,
The third measurement state of the instantaneous heartbeat indicates that the measurement states of one and the other R waves constituting the instantaneous heartbeat are both the noise,
The fourth measurement state of the instantaneous heartbeat indicates that the measurement state of one R wave that constitutes the instantaneous heartbeat is the normal measurement state, and the other measurement state is the abnormal measurement state,
The fifth measurement state of the instantaneous heartbeat indicates that one R wave constituting the instantaneous heartbeat has the noise measurement state and the other measurement state has the abnormal measurement state,
The sixth measurement state of the instantaneous heartbeat is an instantaneous heartbeat evaluation method that indicates that the measurement states of one and the other R waves that make up the instantaneous heartbeat are both abnormal measurement states . A method applied to a device,
The R wave of the electrocardiogram is extracted on the basis of the signal output from the electrocardiographic measurement means for measuring the electrocardiogram of the subject,
Calculating the extracted instantaneous heartbeat, which is the interval between two adjacent R waves in time series,
Evaluating the calculated measurement state of the instantaneous heartbeat, which is the interval between the R waves, according to the type of the respective measurement states of the two adjacent R waves that are extracted ,
If the measured state of the instantaneous heartbeat evaluated according to the signal output from the electrocardiographic measurement means within a certain period of time satisfies the condition of reporting an abnormal measured state, it is notified that the condition is satisfied. Instant heart rate evaluation method to report . A program used for a computer that operates as a part of the instantaneous heartbeat evaluation apparatus according to any one of claims 1 , 3 and 5 ,
The computer,
Instantaneous heart rate evaluation processing program to function as the respective manual stage.