Marfan syndrome (MFS) is a connective tissue disorder with autosomal dominant inheritance and a h... more Marfan syndrome (MFS) is a connective tissue disorder with autosomal dominant inheritance and a highly variable clinical spectrum. However, there are limited data available on the clinical features of Korean patients with MFS. The aim of the present study was to describe the clinical characteristics and outcomes of Korean patients with MFS. We included all patients who were diagnosed with MFS between January 1995 and May 2015 at a single tertiary medical center. Patients with an MFS-related disorder including MASS phenotype (myopia, mitral valve prolapse, borderline and non-progressive aortic root dilatation, skeletal findings, and striae), mitral valve prolapse syndrome, and ectopia lentis syndrome were excluded. A total of 343 Korean patients aged ≥15 years who satisfied the revised Ghent nosology were included. The mean patient age at diagnosis was 35.9±12.6 years and 172 (50.1%) patients were male. Median follow-up duration was 52.8 months. A total of 303 patients (88.6%) had ao...
The American journal of the medical sciences, 2016
Little is known about the association between shock index and myocardial injury in patients with ... more Little is known about the association between shock index and myocardial injury in patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI). We analyzed cardiac magnetic resonance imaging from 306 consecutive patients treated with primary PCI for STEMI. The patients were divided into the following 2 groups: initial shock index >0.7 (n = 88) and ≤0.7 (n = 218). Shock index was calculated as the ratio of heart rate to systolic blood pressure based on the first recorded vital signs upon arrival. The primary end point was myocardial infarct size. The shock index >0.7 group, exhibited a lower baseline left ventricular ejection fraction (P = 0.01), higher N-terminal prohormone of brain natriuretic peptide level (P = 0.01), higher Killip class (P < 0.01) and higher prevalence of diabetes (P = 0.02) than the shock index ≤0.7 group. There were no significant differences in the angiographic or procedural characterist...
Acta radiologica (Stockholm, Sweden : 1987), Jan 22, 2016
Triple rule-out computed tomography (TRO CT) is a CT protocol designed to simultaneously evaluate... more Triple rule-out computed tomography (TRO CT) is a CT protocol designed to simultaneously evaluate the coronary, aorta, and pulmonary arteries. To evaluate potential diagnostic performance of TRO CT with restricted volume coverage for detection of pulmonary thromboembolism (PTE) and aortic dissection (AD). This study included 1224 consecutive patients with acute chest pain who visited the emergency department and underwent TRO CT using a 128-slice dual-source CT. Image data were reconstructed according to the display field of view (DFOV) of coronary CT angiography (CCTA) and TRO CT protocols in each patient. The presence of PTE and AD was evaluated by independent observers in each DFOV. The radiation dose was calculated to evaluate the potential benefits by restricting z-axis coverage to cardiac scan range instead of the whole thorax. Among all patients, 22 cases with PTE (1.9%) and nine cases with AD (0.8%) were found. Except for one PTE case, all cases were detected on both DFOV of...
Elevated D-dimer levels on admission predict prognosis in patients undergoing primary percutaneou... more Elevated D-dimer levels on admission predict prognosis in patients undergoing primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI), but the association of D-dimer levels with structural markers of myocardial injury in these patients is unknown. We performed cardiac magnetic resonance (CMR) imaging in 208 patients treated with primary PCI for STEMI. CMR was performed a median of 3 days after the index procedure. Of the 208 patients studied, 75 patients had D-dimer levels above the normal range on admission (>0.5 μg/mL; high D-dimer group) while 133 had normal levels (≤0.5 μg/mL; low D-dimer group). The primary outcome was myocardial infarct size assessed by CMR. Secondary outcomes included area at risk (AAR), microvascular obstruction (MVO) area, and myocardial salvage index (MSI). In CMR analysis, myocardial infarct size was larger in the high D-dimer group than in the low D-dimer group (22.3% [16.2-30.5] versus 18.8% [10.7-26.7]...
We investigated the mammographic, sonographic, and pathologic findings in metaplastic carcinoma o... more We investigated the mammographic, sonographic, and pathologic findings in metaplastic carcinoma of the breast. The mammographic (n = 16) and sonographic (n = 11) findings in 16 patients with metaplastic carcinoma of the breast were analyzed retrospectively along with pathologic findings. Whenever possible, results of preoperative fine-needle aspiration biopsy and immunohistochemical studies were obtained. All patients presented with a palpable breast mass. The mean size of the lesions at pathologic examination was 4.2 cm. On mammography, 15 patients had a mass (1 patient had 2 masses), and 1 patient had only clustered microcalcifications without an associated mass. The mean longest diameter of the 16 masses on mammography was 4.6 cm. Eleven lesions (69%) were round to ovoid in shape, 13 lesions (81%) showed ill-defined or obscured margins, and 10 lesions (63%) showed associated architectural distortion. On sonography, 6 (55%) of 11 lesions were round to ovoid, 9 lesions (82%) had well-defined margins, and 6 lesions (55%) showed complex echogenicity with solid and cystic components. At pathologic examination, 4 of these 6 lesions showed hemorrhagic or cystic necrosis. Axillary lymph nodes were positive in 6 (40%) of 15 patients in whom axillary node dissection was performed. Metaplastic carcinoma of the breast manifests as a rapidly growing, mammographically ill-defined round mass with associated architectural distortion on mammograms. Complex echogenicity with solid and cystic components may be seen sonographically and is related to hemorrhagic or cystic necrosis seen pathologically.
Congenital abnormalities of the coronary arteries are an uncommon but important cause of chest pa... more Congenital abnormalities of the coronary arteries are an uncommon but important cause of chest pain and, in some cases of hemodynamically significant abnormalities, sudden cardiac death. For several decades, premorbid diagnosis of coronary artery anomalies has been made with conventional angiography. However, this imaging technique has limitations due to its projectional and invasive nature. The recent development of electrocardiographically (ECG)-gated multi-detector row computed tomography (CT) allows accurate and noninvasive depiction of coronary artery anomalies of origin, course, and termination. Multi-detector row CT is superior to conventional angiography in delineating the ostial origin and proximal path of an anomalous coronary artery. Familiarity with the CT appearances of various coronary artery anomalies and an understanding of the clinical significance of these anomalies are essential in making a correct diagnosis and planning patient treatment.
To propose a hypothesis about the embryogenesis of the subaortic left innominate vein, the author... more To propose a hypothesis about the embryogenesis of the subaortic left innominate vein, the authors reviewed the radiologic features of 14 patients diagnosed with subaortic left innominate vein made by computed tomography or magnetic resonance imaging scan. The authors retrospectively analyzed the level of the aortic arch, associated aortic arch anomalies, and the presence or absence of obliteration of the prevascular space. A high aortic arch was seen in 10 patients, five with a cervical, two with a right and, one with a double aortic arch. The prevascular space was occupied by the aortic arch, the great arteries, or both in all 10 patients with a high arch. In the remaining four patients with a normal aortic arch, the prevascular space was preserved, but abnormal elongation of the aortic segment between the left common carotid artery and the left subclavian artery was seen in three. The authors postulate that precardinal anastomosis can develop in any pathway where there is the available space. In the presence of abnormal elongation of the aortic arch and resultant widening of the subaortic space, the chance of the development of a subaortic left innominate vein increases.
European Journal of Vascular and Endovascular Surgery the Official Journal of the European Society For Vascular Surgery, Mar 31, 2008
To test the hypothesis that a proximal arterial occlusion has a protective effect on the progress... more To test the hypothesis that a proximal arterial occlusion has a protective effect on the progression of distal arterial disease, assessed by distal runoff resistance score (DRRS). One hundred and nineteen patients (median age 64 y, male 96%) with a unilateral iliac and/or femoral arterial occlusion caused by atherosclerosis were analyzed retrospectively. DRRS was assessed on arteriograms of the test limb (with proximal arterial occlusion) and control limb (contralateral limb). Multivariate analysis was performed to determine if a proximal arterial occlusion was an independent risk factor for the development of a difference in the DRRS between the test and control limbs. The clinical features of the subjects were claudication in 85%, ankle brachial index 0.52 (median), diabetes in 30% and smoker in 76%. The upper leg DRRS of the test limb was significantly lower in the iliac occlusion group than in the control limb (1.87+/-1.69 vs 2.85+/-2.75, p=0.032). However, multivariate analysis failed to identify any risk factors associated with the difference in DRRS in both limbs. There was no evidence that a proximal arterial occlusion was associated with a slower progression of distal arterial disease.
Journal of cardiovascular computed tomography, Jan 23, 2016
Clinical evidence supporting triple rule-out computed tomography (TRO-CT) for rapid screening of ... more Clinical evidence supporting triple rule-out computed tomography (TRO-CT) for rapid screening of cardiovascular disease is limited. We investigated the clinical value of TRO-CT in patients with acute chest pain. We retrospectively enrolled 1024 patients who visited the emergency department (ED) with acute chest pain and underwent TRO-CT using a 128-slice CT system. TRO-CT was classified as "positive" if it revealed clinically significant cardiovascular disease including obstructive coronary artery disease, pulmonary thromboembolism, or acute aortic syndrome. The clinical endpoint was occurrence of a major adverse cardiovascular event (MACE) within 30 days, defined by a composite of all cause death, myocardial infarction, revascularization, major cardiovascular surgery, or thrombolytic therapy. Clinical risk scores for acute chest pain including TIMI, GRACE, Diamond-Forrester, and HEART were determined and compared to the TRO-CT findings. TRO-CT revealed clinically signific...
Coronary MR angiography can be useful for noninvasive diagnosis of potentially life-threatening c... more Coronary MR angiography can be useful for noninvasive diagnosis of potentially life-threatening coronary artery anomalies. However, there has been no report to date on MR demonstration of acute myocardial infarction associated with right coronary artery anomaly. A 55-year-old man was admitted with chest pain. Catheter coronary angiography revealed an anomalous origin with compression in the proximal segment of right coronary artery. Breath-hold MR angiography using spiral acquisition technique showed that the right coronary artery originated from the left coronary sinus with a separate os. The proximal segment of the artery was compressed by right ventricle outflow tract during the diastolic phase of cine MR imaging. Contrast-enhanced MR imaging 5 minutes after Gd-DTPA injection showed hyperenhancement suggestive of acute myocardial infarction in the posteroinferior wall of the left ventricle.
Journal of Vascular and Interventional Radiology, Apr 30, 2008
To evaluate the feasibility and clinical usefulness of peripherally inserted central catheter (PI... more To evaluate the feasibility and clinical usefulness of peripherally inserted central catheter (PICC) placement in patients with unsuspected central venous obstruction. Of 3,272 PICC procedures performed from January 1999 to July 2006, 57 patients had central venous stenosis or obstruction during placement of the PICC. Sixty PICC placements were performed in 57 patients (30 male and 27 female patients; mean age, 59 years). The PICC placements in 57 patients were evaluated with regard to the location and severity of venous disease, underlying causes of venous stenosis or obstruction, catheter placement technique, technical success rate, catheter dwelling time, and complication rate. There were 48 complete obstructions and 12 stenoses. Ipsilateral lesion passage was attempted in 31 patients and was successful in 26 (84%) and unsuccessful in five (16%). Over-the-wire PICC placement was performed in 16 patients, and PICC placement after angioplasty was performed in 10. Contralateral PICC placement without a trial of traversing the lesion was done in 26 patients. The PICC dwell time ranged from 2 to 150 days (median, 25.5 days). Complications occurred in four of the 57 patients (7%) and included tube tip migration (n = 1), catheter occlusion (n = 1), and catheter infection (n = 2). PICCs can be safely placed across central venous lesions in patients with asymptomatic central venous stenosis or obstruction. Contralateral placement is favorable in cases of ipsilateral passage failure.
BACKGROUND AND OBJECTIVES: akayasu's arteritis is a disease of unknown etiology which has re... more BACKGROUND AND OBJECTIVES: akayasu's arteritis is a disease of unknown etiology which has recently been reported to be a systemic disease. This is a prospective study of the clinical features and angiographic findings of Takayasu's arteritis from a single center. ...
Marfan syndrome (MFS) is a connective tissue disorder with autosomal dominant inheritance and a h... more Marfan syndrome (MFS) is a connective tissue disorder with autosomal dominant inheritance and a highly variable clinical spectrum. However, there are limited data available on the clinical features of Korean patients with MFS. The aim of the present study was to describe the clinical characteristics and outcomes of Korean patients with MFS. We included all patients who were diagnosed with MFS between January 1995 and May 2015 at a single tertiary medical center. Patients with an MFS-related disorder including MASS phenotype (myopia, mitral valve prolapse, borderline and non-progressive aortic root dilatation, skeletal findings, and striae), mitral valve prolapse syndrome, and ectopia lentis syndrome were excluded. A total of 343 Korean patients aged ≥15 years who satisfied the revised Ghent nosology were included. The mean patient age at diagnosis was 35.9±12.6 years and 172 (50.1%) patients were male. Median follow-up duration was 52.8 months. A total of 303 patients (88.6%) had ao...
The American journal of the medical sciences, 2016
Little is known about the association between shock index and myocardial injury in patients with ... more Little is known about the association between shock index and myocardial injury in patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI). We analyzed cardiac magnetic resonance imaging from 306 consecutive patients treated with primary PCI for STEMI. The patients were divided into the following 2 groups: initial shock index >0.7 (n = 88) and ≤0.7 (n = 218). Shock index was calculated as the ratio of heart rate to systolic blood pressure based on the first recorded vital signs upon arrival. The primary end point was myocardial infarct size. The shock index >0.7 group, exhibited a lower baseline left ventricular ejection fraction (P = 0.01), higher N-terminal prohormone of brain natriuretic peptide level (P = 0.01), higher Killip class (P < 0.01) and higher prevalence of diabetes (P = 0.02) than the shock index ≤0.7 group. There were no significant differences in the angiographic or procedural characterist...
Acta radiologica (Stockholm, Sweden : 1987), Jan 22, 2016
Triple rule-out computed tomography (TRO CT) is a CT protocol designed to simultaneously evaluate... more Triple rule-out computed tomography (TRO CT) is a CT protocol designed to simultaneously evaluate the coronary, aorta, and pulmonary arteries. To evaluate potential diagnostic performance of TRO CT with restricted volume coverage for detection of pulmonary thromboembolism (PTE) and aortic dissection (AD). This study included 1224 consecutive patients with acute chest pain who visited the emergency department and underwent TRO CT using a 128-slice dual-source CT. Image data were reconstructed according to the display field of view (DFOV) of coronary CT angiography (CCTA) and TRO CT protocols in each patient. The presence of PTE and AD was evaluated by independent observers in each DFOV. The radiation dose was calculated to evaluate the potential benefits by restricting z-axis coverage to cardiac scan range instead of the whole thorax. Among all patients, 22 cases with PTE (1.9%) and nine cases with AD (0.8%) were found. Except for one PTE case, all cases were detected on both DFOV of...
Elevated D-dimer levels on admission predict prognosis in patients undergoing primary percutaneou... more Elevated D-dimer levels on admission predict prognosis in patients undergoing primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI), but the association of D-dimer levels with structural markers of myocardial injury in these patients is unknown. We performed cardiac magnetic resonance (CMR) imaging in 208 patients treated with primary PCI for STEMI. CMR was performed a median of 3 days after the index procedure. Of the 208 patients studied, 75 patients had D-dimer levels above the normal range on admission (>0.5 μg/mL; high D-dimer group) while 133 had normal levels (≤0.5 μg/mL; low D-dimer group). The primary outcome was myocardial infarct size assessed by CMR. Secondary outcomes included area at risk (AAR), microvascular obstruction (MVO) area, and myocardial salvage index (MSI). In CMR analysis, myocardial infarct size was larger in the high D-dimer group than in the low D-dimer group (22.3% [16.2-30.5] versus 18.8% [10.7-26.7]...
We investigated the mammographic, sonographic, and pathologic findings in metaplastic carcinoma o... more We investigated the mammographic, sonographic, and pathologic findings in metaplastic carcinoma of the breast. The mammographic (n = 16) and sonographic (n = 11) findings in 16 patients with metaplastic carcinoma of the breast were analyzed retrospectively along with pathologic findings. Whenever possible, results of preoperative fine-needle aspiration biopsy and immunohistochemical studies were obtained. All patients presented with a palpable breast mass. The mean size of the lesions at pathologic examination was 4.2 cm. On mammography, 15 patients had a mass (1 patient had 2 masses), and 1 patient had only clustered microcalcifications without an associated mass. The mean longest diameter of the 16 masses on mammography was 4.6 cm. Eleven lesions (69%) were round to ovoid in shape, 13 lesions (81%) showed ill-defined or obscured margins, and 10 lesions (63%) showed associated architectural distortion. On sonography, 6 (55%) of 11 lesions were round to ovoid, 9 lesions (82%) had well-defined margins, and 6 lesions (55%) showed complex echogenicity with solid and cystic components. At pathologic examination, 4 of these 6 lesions showed hemorrhagic or cystic necrosis. Axillary lymph nodes were positive in 6 (40%) of 15 patients in whom axillary node dissection was performed. Metaplastic carcinoma of the breast manifests as a rapidly growing, mammographically ill-defined round mass with associated architectural distortion on mammograms. Complex echogenicity with solid and cystic components may be seen sonographically and is related to hemorrhagic or cystic necrosis seen pathologically.
Congenital abnormalities of the coronary arteries are an uncommon but important cause of chest pa... more Congenital abnormalities of the coronary arteries are an uncommon but important cause of chest pain and, in some cases of hemodynamically significant abnormalities, sudden cardiac death. For several decades, premorbid diagnosis of coronary artery anomalies has been made with conventional angiography. However, this imaging technique has limitations due to its projectional and invasive nature. The recent development of electrocardiographically (ECG)-gated multi-detector row computed tomography (CT) allows accurate and noninvasive depiction of coronary artery anomalies of origin, course, and termination. Multi-detector row CT is superior to conventional angiography in delineating the ostial origin and proximal path of an anomalous coronary artery. Familiarity with the CT appearances of various coronary artery anomalies and an understanding of the clinical significance of these anomalies are essential in making a correct diagnosis and planning patient treatment.
To propose a hypothesis about the embryogenesis of the subaortic left innominate vein, the author... more To propose a hypothesis about the embryogenesis of the subaortic left innominate vein, the authors reviewed the radiologic features of 14 patients diagnosed with subaortic left innominate vein made by computed tomography or magnetic resonance imaging scan. The authors retrospectively analyzed the level of the aortic arch, associated aortic arch anomalies, and the presence or absence of obliteration of the prevascular space. A high aortic arch was seen in 10 patients, five with a cervical, two with a right and, one with a double aortic arch. The prevascular space was occupied by the aortic arch, the great arteries, or both in all 10 patients with a high arch. In the remaining four patients with a normal aortic arch, the prevascular space was preserved, but abnormal elongation of the aortic segment between the left common carotid artery and the left subclavian artery was seen in three. The authors postulate that precardinal anastomosis can develop in any pathway where there is the available space. In the presence of abnormal elongation of the aortic arch and resultant widening of the subaortic space, the chance of the development of a subaortic left innominate vein increases.
European Journal of Vascular and Endovascular Surgery the Official Journal of the European Society For Vascular Surgery, Mar 31, 2008
To test the hypothesis that a proximal arterial occlusion has a protective effect on the progress... more To test the hypothesis that a proximal arterial occlusion has a protective effect on the progression of distal arterial disease, assessed by distal runoff resistance score (DRRS). One hundred and nineteen patients (median age 64 y, male 96%) with a unilateral iliac and/or femoral arterial occlusion caused by atherosclerosis were analyzed retrospectively. DRRS was assessed on arteriograms of the test limb (with proximal arterial occlusion) and control limb (contralateral limb). Multivariate analysis was performed to determine if a proximal arterial occlusion was an independent risk factor for the development of a difference in the DRRS between the test and control limbs. The clinical features of the subjects were claudication in 85%, ankle brachial index 0.52 (median), diabetes in 30% and smoker in 76%. The upper leg DRRS of the test limb was significantly lower in the iliac occlusion group than in the control limb (1.87+/-1.69 vs 2.85+/-2.75, p=0.032). However, multivariate analysis failed to identify any risk factors associated with the difference in DRRS in both limbs. There was no evidence that a proximal arterial occlusion was associated with a slower progression of distal arterial disease.
Journal of cardiovascular computed tomography, Jan 23, 2016
Clinical evidence supporting triple rule-out computed tomography (TRO-CT) for rapid screening of ... more Clinical evidence supporting triple rule-out computed tomography (TRO-CT) for rapid screening of cardiovascular disease is limited. We investigated the clinical value of TRO-CT in patients with acute chest pain. We retrospectively enrolled 1024 patients who visited the emergency department (ED) with acute chest pain and underwent TRO-CT using a 128-slice CT system. TRO-CT was classified as "positive" if it revealed clinically significant cardiovascular disease including obstructive coronary artery disease, pulmonary thromboembolism, or acute aortic syndrome. The clinical endpoint was occurrence of a major adverse cardiovascular event (MACE) within 30 days, defined by a composite of all cause death, myocardial infarction, revascularization, major cardiovascular surgery, or thrombolytic therapy. Clinical risk scores for acute chest pain including TIMI, GRACE, Diamond-Forrester, and HEART were determined and compared to the TRO-CT findings. TRO-CT revealed clinically signific...
Coronary MR angiography can be useful for noninvasive diagnosis of potentially life-threatening c... more Coronary MR angiography can be useful for noninvasive diagnosis of potentially life-threatening coronary artery anomalies. However, there has been no report to date on MR demonstration of acute myocardial infarction associated with right coronary artery anomaly. A 55-year-old man was admitted with chest pain. Catheter coronary angiography revealed an anomalous origin with compression in the proximal segment of right coronary artery. Breath-hold MR angiography using spiral acquisition technique showed that the right coronary artery originated from the left coronary sinus with a separate os. The proximal segment of the artery was compressed by right ventricle outflow tract during the diastolic phase of cine MR imaging. Contrast-enhanced MR imaging 5 minutes after Gd-DTPA injection showed hyperenhancement suggestive of acute myocardial infarction in the posteroinferior wall of the left ventricle.
Journal of Vascular and Interventional Radiology, Apr 30, 2008
To evaluate the feasibility and clinical usefulness of peripherally inserted central catheter (PI... more To evaluate the feasibility and clinical usefulness of peripherally inserted central catheter (PICC) placement in patients with unsuspected central venous obstruction. Of 3,272 PICC procedures performed from January 1999 to July 2006, 57 patients had central venous stenosis or obstruction during placement of the PICC. Sixty PICC placements were performed in 57 patients (30 male and 27 female patients; mean age, 59 years). The PICC placements in 57 patients were evaluated with regard to the location and severity of venous disease, underlying causes of venous stenosis or obstruction, catheter placement technique, technical success rate, catheter dwelling time, and complication rate. There were 48 complete obstructions and 12 stenoses. Ipsilateral lesion passage was attempted in 31 patients and was successful in 26 (84%) and unsuccessful in five (16%). Over-the-wire PICC placement was performed in 16 patients, and PICC placement after angioplasty was performed in 10. Contralateral PICC placement without a trial of traversing the lesion was done in 26 patients. The PICC dwell time ranged from 2 to 150 days (median, 25.5 days). Complications occurred in four of the 57 patients (7%) and included tube tip migration (n = 1), catheter occlusion (n = 1), and catheter infection (n = 2). PICCs can be safely placed across central venous lesions in patients with asymptomatic central venous stenosis or obstruction. Contralateral placement is favorable in cases of ipsilateral passage failure.
BACKGROUND AND OBJECTIVES: akayasu's arteritis is a disease of unknown etiology which has re... more BACKGROUND AND OBJECTIVES: akayasu's arteritis is a disease of unknown etiology which has recently been reported to be a systemic disease. This is a prospective study of the clinical features and angiographic findings of Takayasu's arteritis from a single center. ...
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