Pericardial tamponade resulting in hemodynamic compromise requiring either pericardiocentesis [Va... more Pericardial tamponade resulting in hemodynamic compromise requiring either pericardiocentesis [Vandyke 1983] or subxiphoid pericardial window has been reported in literature [Armstrong 1984]. There are no large case series, only scattered case reports. Cardiac tamponade is known to affect the diastolic function of the heart but rare reports have documented systolic impairment of the left and right ventricle in the setting of tamponade [Vandyke 1983; Armstrong 1984]. We report a case of a transient biventricular systolic dysfunction in a patient with early cardiac tamponade after surgical drainage of pericardia1 effusion.
ASAIO journal (American Society for Artificial Internal Organs : 1992)
Preexisting organ dysfunctions are known factors of death after placement of implantable mechanic... more Preexisting organ dysfunctions are known factors of death after placement of implantable mechanical circulatory support (MCS). Extracorporeal membrane oxygenation (ECMO) may able to stabilize organ function in patients with cardiogenic shock before MCS implantation. Between 2008 and 2012, 17 patients with cardiogenic shock were supported with ECMO before implantable MCS placement. Patient's end-organ functions were assessed by metabolic, cardiac, hepatic, renal, and respiratory parameters. Survival data after MCS implantations were analyzed for overall survival to discharge, complications, and breakpoint in days on ECMO to survival. Before MCS implantation, lactate, hepatic, and renal functions were improved and pulmonary edema was resolved. The interval between ECMO initiation and MCS placement was 12.1 ± 7.9 days. Overall survival rate to discharge after left ventricular assist device/total artificial heart placement was 76%. The survival of patients transitioned from ECMO to ...
Background: The objective of this study was to assess the relevant routes of infection for hepati... more Background: The objective of this study was to assess the relevant routes of infection for hepatitis C virus in blood donors from Baden-W�rttemberg (Germany). Participants and Methods: For this purpose an epidemiological questionnaire was elaborated and sent to 528 blood donors. One half of these donors had an anti-HCV-positive status confirmed by supplemental test (case group); the other half comprised
Several articles have discussed the weaning process for venoarterial extracorporeal membrane oxyg... more Several articles have discussed the weaning process for venoarterial extracorporeal membrane oxygenation; however, there is no published report to outline a standardized approach for weaning a patient from venovenous extracorporeal membrane oxygenation (ECMO). This complex process requires an organized approach and a thorough understanding of ventilator management and ECMO physiology. The purpose of this article is to describe the venovenous ECMO weaning protocol used at our institution as well as provide a review of the literature.
The SynCardia Total Artificial Heart (TAH) has been used for patients with biventricular failure,... more The SynCardia Total Artificial Heart (TAH) has been used for patients with biventricular failure, who cannot be managed with implantation of a left ventricular (LV) assist device. Following TAH implantation, our patient developed severe hemolysis, which could only be managed successfully by aggressive blood pressure control [Ohashi 2003; Nakata 1998].
Texas Heart Institute Journal from the Texas Heart Institute of St Luke S Episcopal Hospital Texas Children S Hospital, Feb 1, 2004
The use of ventricular assist devices as a bridge to transplantation has become a widely used opt... more The use of ventricular assist devices as a bridge to transplantation has become a widely used option for patients with end-stage heart failure. In contrast to total artificial hearts, ventricular assist devices support the failing heart by bypassing one or both ventricles. In certain cases (myocardial tumors, graft failure, transplant rejection, endocarditis, intracardiac thrombus formation), however, it may be advantageous to excise the heart and replace it with an artificial device. Total artificial hearts are intracorporeal devices designed for this purpose. Unfortunately, some patients are too small or are, for other reasons, ineligible for a total artificial heart.We describe the case of a 55-year-old woman who had ischemic cardiomyopathy and thrombus formation in all 4 cardiac chambers. To reduce the risk of thromboembolic events, we elected to replace her heart completely with 2 extracorporeal ventricular assist devices. The heart was excised via a median sternotomy approach, and the outflow cannulae (from device to patient) were connected to both atrial remnants. The 2 inflow cannulae (from patient to device) were anastomosed end-to-end to the aorta and the pulmonary artery, respectively. After attaining a flow of more than 5 L, the 2 extracorporeal assist devices effectively and efficiently performed the work of the native heart. Thus re-established, organ perfusion was improved by this mechanically driven circulation, as signified by an initial decrease in creatinine and blood urea nitrogen levels. The patient, however, did not recover from postoperative neurological dysfunction and died of respiratory insufficiency and multiple-organ failure on the 26th postoperative day.
Mast cells are best known as primary responders in allergic reactions, including anaphylaxis and ... more Mast cells are best known as primary responders in allergic reactions, including anaphylaxis and asthma. However, recent studies have shown that mast cells are functionally diverse cells with immunoregulatory properties that influence both the innate and adaptive immunities. Mast cells are capable of producing an array of both proinflammatory and anti-inflammatory mediators, acting as antigen-presenting cells, and expressing a spectrum of costimulatory molecules. Moreover, mast cells seem to confer a certain degree of immune privilege to tissues in concert with T-regulatory cells and are essential players in fibrotic conditions. The following review of the literature serves to further define the role of mast cells in the immunologic reactions affecting transplanted solid organ grafts.
Zusammenfassung Hintergrund Linksventrikuläre mechanische Supportsysteme, left ventricular assist... more Zusammenfassung Hintergrund Linksventrikuläre mechanische Supportsysteme, left ventricular assist devices oder kurz LVAD, erlauben, Patientien mit terminalen Herzversagen bis zur Transplantation zu unterstützen. Dies hat positiven Einfluss zum einen auf die Überlebensrate als auch auf mögliche peri-operative Komplikationen. Wir berichten über unsere Erfahrungen mit einem LVAD-Koordinator, insbesondere hinsichtlich Patientengenesung und Inzidenz an Komplikationen. Methodik In der Zeit vom Juni 2000 und
<p>The Syncardia™ total artificial heart (TAH) is an option for patients as a bridge to tra... more <p>The Syncardia™ total artificial heart (TAH) is an option for patients as a bridge to transplant in those who are not candidates for left ventricular assist devices (LVAD) due to right ventricular failure. Postoperative course is highly dependent on volume status and aggressive diuresis is often necessary. One complication from aggressive diuresis is hypokalemia; however, in these patients we tolerate a lower potassium level because cardiac arrhythmias are not a concern. However, in two separate instances non-cardiac symptoms related to severe hypokalemia occurred. These symptoms included nystagmus in one patient and agitation, tremors, and having an “out-of-body” experience in the other patient. Both these patients had resolution of symptoms with potassium replacement.</p>
As a bridge to transplant, the Syncardia™ total artificial heart (TAH) is an option for patients ... more As a bridge to transplant, the Syncardia™ total artificial heart (TAH) is an option for patients who are not candidates for left ventricular assist devices (LVAD) due to right ventricular failure. The need for nutritional support in these patients is essential for a favorable outcome. Low body mass indexes and albumin levels have been associated with increased morbidity and mortality in cardiac surgery patients [Alverdy 2003]. It is not uncommon for postoperative patients to have difficulty in consuming enough calories after surgery, which is further complicated by a hypermetabolic demand due to surgical stress. Enteral nutrition has typically been favored for gut mucosal integrity and bacterial flora [Alverdy 2003] [Engleman 1999]. We describe the need for prolonged enteral nutritional support in a TAH patient that was accomplished with a percutaneous endoscopic gastrostomy (PEG) tube.
Nocardia has emerged as an important opportunistic pathogen, especially in organ transplant recip... more Nocardia has emerged as an important opportunistic pathogen, especially in organ transplant recipients. Heart transplant (HT) recipients initially had an especially high rate of Nocardia infection, but this could be reduced by the routine use of cyclosporine. Our objective was to clarify the prevalence and presentation of Nocardiosis in HT recipients in a retrospective cross-sectional analysis.
The International journal of artificial organs, Jan 5, 2015
Space-consuming mediastinal tumors can create respiratory failure. We are reporting on a case of ... more Space-consuming mediastinal tumors can create respiratory failure. We are reporting on a case of mediastinal lymphoma, which created respiratory failure in our patient. IV steroid therapy was used in our patient, who presented with end-stage respiratory failure. Conservative management of our patient was possible without the application of ECMO. In the right patient population, IV steroid treatment can avoid further deterioration of end-stage respiratory failure.
Pericardial tamponade resulting in hemodynamic compromise requiring either pericardiocentesis [Va... more Pericardial tamponade resulting in hemodynamic compromise requiring either pericardiocentesis [Vandyke 1983] or subxiphoid pericardial window has been reported in literature [Armstrong 1984]. There are no large case series, only scattered case reports. Cardiac tamponade is known to affect the diastolic function of the heart but rare reports have documented systolic impairment of the left and right ventricle in the setting of tamponade [Vandyke 1983; Armstrong 1984]. We report a case of a transient biventricular systolic dysfunction in a patient with early cardiac tamponade after surgical drainage of pericardia1 effusion.
ASAIO journal (American Society for Artificial Internal Organs : 1992)
Preexisting organ dysfunctions are known factors of death after placement of implantable mechanic... more Preexisting organ dysfunctions are known factors of death after placement of implantable mechanical circulatory support (MCS). Extracorporeal membrane oxygenation (ECMO) may able to stabilize organ function in patients with cardiogenic shock before MCS implantation. Between 2008 and 2012, 17 patients with cardiogenic shock were supported with ECMO before implantable MCS placement. Patient's end-organ functions were assessed by metabolic, cardiac, hepatic, renal, and respiratory parameters. Survival data after MCS implantations were analyzed for overall survival to discharge, complications, and breakpoint in days on ECMO to survival. Before MCS implantation, lactate, hepatic, and renal functions were improved and pulmonary edema was resolved. The interval between ECMO initiation and MCS placement was 12.1 ± 7.9 days. Overall survival rate to discharge after left ventricular assist device/total artificial heart placement was 76%. The survival of patients transitioned from ECMO to ...
Background: The objective of this study was to assess the relevant routes of infection for hepati... more Background: The objective of this study was to assess the relevant routes of infection for hepatitis C virus in blood donors from Baden-W�rttemberg (Germany). Participants and Methods: For this purpose an epidemiological questionnaire was elaborated and sent to 528 blood donors. One half of these donors had an anti-HCV-positive status confirmed by supplemental test (case group); the other half comprised
Several articles have discussed the weaning process for venoarterial extracorporeal membrane oxyg... more Several articles have discussed the weaning process for venoarterial extracorporeal membrane oxygenation; however, there is no published report to outline a standardized approach for weaning a patient from venovenous extracorporeal membrane oxygenation (ECMO). This complex process requires an organized approach and a thorough understanding of ventilator management and ECMO physiology. The purpose of this article is to describe the venovenous ECMO weaning protocol used at our institution as well as provide a review of the literature.
The SynCardia Total Artificial Heart (TAH) has been used for patients with biventricular failure,... more The SynCardia Total Artificial Heart (TAH) has been used for patients with biventricular failure, who cannot be managed with implantation of a left ventricular (LV) assist device. Following TAH implantation, our patient developed severe hemolysis, which could only be managed successfully by aggressive blood pressure control [Ohashi 2003; Nakata 1998].
Texas Heart Institute Journal from the Texas Heart Institute of St Luke S Episcopal Hospital Texas Children S Hospital, Feb 1, 2004
The use of ventricular assist devices as a bridge to transplantation has become a widely used opt... more The use of ventricular assist devices as a bridge to transplantation has become a widely used option for patients with end-stage heart failure. In contrast to total artificial hearts, ventricular assist devices support the failing heart by bypassing one or both ventricles. In certain cases (myocardial tumors, graft failure, transplant rejection, endocarditis, intracardiac thrombus formation), however, it may be advantageous to excise the heart and replace it with an artificial device. Total artificial hearts are intracorporeal devices designed for this purpose. Unfortunately, some patients are too small or are, for other reasons, ineligible for a total artificial heart.We describe the case of a 55-year-old woman who had ischemic cardiomyopathy and thrombus formation in all 4 cardiac chambers. To reduce the risk of thromboembolic events, we elected to replace her heart completely with 2 extracorporeal ventricular assist devices. The heart was excised via a median sternotomy approach, and the outflow cannulae (from device to patient) were connected to both atrial remnants. The 2 inflow cannulae (from patient to device) were anastomosed end-to-end to the aorta and the pulmonary artery, respectively. After attaining a flow of more than 5 L, the 2 extracorporeal assist devices effectively and efficiently performed the work of the native heart. Thus re-established, organ perfusion was improved by this mechanically driven circulation, as signified by an initial decrease in creatinine and blood urea nitrogen levels. The patient, however, did not recover from postoperative neurological dysfunction and died of respiratory insufficiency and multiple-organ failure on the 26th postoperative day.
Mast cells are best known as primary responders in allergic reactions, including anaphylaxis and ... more Mast cells are best known as primary responders in allergic reactions, including anaphylaxis and asthma. However, recent studies have shown that mast cells are functionally diverse cells with immunoregulatory properties that influence both the innate and adaptive immunities. Mast cells are capable of producing an array of both proinflammatory and anti-inflammatory mediators, acting as antigen-presenting cells, and expressing a spectrum of costimulatory molecules. Moreover, mast cells seem to confer a certain degree of immune privilege to tissues in concert with T-regulatory cells and are essential players in fibrotic conditions. The following review of the literature serves to further define the role of mast cells in the immunologic reactions affecting transplanted solid organ grafts.
Zusammenfassung Hintergrund Linksventrikuläre mechanische Supportsysteme, left ventricular assist... more Zusammenfassung Hintergrund Linksventrikuläre mechanische Supportsysteme, left ventricular assist devices oder kurz LVAD, erlauben, Patientien mit terminalen Herzversagen bis zur Transplantation zu unterstützen. Dies hat positiven Einfluss zum einen auf die Überlebensrate als auch auf mögliche peri-operative Komplikationen. Wir berichten über unsere Erfahrungen mit einem LVAD-Koordinator, insbesondere hinsichtlich Patientengenesung und Inzidenz an Komplikationen. Methodik In der Zeit vom Juni 2000 und
<p>The Syncardia™ total artificial heart (TAH) is an option for patients as a bridge to tra... more <p>The Syncardia™ total artificial heart (TAH) is an option for patients as a bridge to transplant in those who are not candidates for left ventricular assist devices (LVAD) due to right ventricular failure. Postoperative course is highly dependent on volume status and aggressive diuresis is often necessary. One complication from aggressive diuresis is hypokalemia; however, in these patients we tolerate a lower potassium level because cardiac arrhythmias are not a concern. However, in two separate instances non-cardiac symptoms related to severe hypokalemia occurred. These symptoms included nystagmus in one patient and agitation, tremors, and having an “out-of-body” experience in the other patient. Both these patients had resolution of symptoms with potassium replacement.</p>
As a bridge to transplant, the Syncardia™ total artificial heart (TAH) is an option for patients ... more As a bridge to transplant, the Syncardia™ total artificial heart (TAH) is an option for patients who are not candidates for left ventricular assist devices (LVAD) due to right ventricular failure. The need for nutritional support in these patients is essential for a favorable outcome. Low body mass indexes and albumin levels have been associated with increased morbidity and mortality in cardiac surgery patients [Alverdy 2003]. It is not uncommon for postoperative patients to have difficulty in consuming enough calories after surgery, which is further complicated by a hypermetabolic demand due to surgical stress. Enteral nutrition has typically been favored for gut mucosal integrity and bacterial flora [Alverdy 2003] [Engleman 1999]. We describe the need for prolonged enteral nutritional support in a TAH patient that was accomplished with a percutaneous endoscopic gastrostomy (PEG) tube.
Nocardia has emerged as an important opportunistic pathogen, especially in organ transplant recip... more Nocardia has emerged as an important opportunistic pathogen, especially in organ transplant recipients. Heart transplant (HT) recipients initially had an especially high rate of Nocardia infection, but this could be reduced by the routine use of cyclosporine. Our objective was to clarify the prevalence and presentation of Nocardiosis in HT recipients in a retrospective cross-sectional analysis.
The International journal of artificial organs, Jan 5, 2015
Space-consuming mediastinal tumors can create respiratory failure. We are reporting on a case of ... more Space-consuming mediastinal tumors can create respiratory failure. We are reporting on a case of mediastinal lymphoma, which created respiratory failure in our patient. IV steroid therapy was used in our patient, who presented with end-stage respiratory failure. Conservative management of our patient was possible without the application of ECMO. In the right patient population, IV steroid treatment can avoid further deterioration of end-stage respiratory failure.
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