Left Ventricular Assist Devices - Ether
... In 1990 the age-adjusted death rate from congestive heart failure was 106.4 per 100,000,5 more than that from breast cancer and the acquired immunodeficiency syndrome combined.6,7 The median survival after diagnosis is 1.7 years in men and 3.2 years in women, with a 5-year survival rate of less than ...
... In 1990 the age-adjusted death rate from congestive heart failure was 106.4 per 100,000,5 more than that from breast cancer and the acquired immunodeficiency syndrome combined.6,7 The median survival after diagnosis is 1.7 years in men and 3.2 years in women, with a 5-year survival rate of less than ...
Assessment of longitudinal left ventricular systolic function by
... might represent a new, powerful method for quantifying regional myocardial function (7, 8). This method is less influenced by tethering effects than Doppler tissue imaging, but it is markedly load-dependent (8). Different from S and SR rate, TDV is dependent of whole heart translation and tethering ...
... might represent a new, powerful method for quantifying regional myocardial function (7, 8). This method is less influenced by tethering effects than Doppler tissue imaging, but it is markedly load-dependent (8). Different from S and SR rate, TDV is dependent of whole heart translation and tethering ...
PARAMETER ESTIMATION BASED ON A SWITCHED OBSERVER
... In (Kim et al., 1998) Emax estimation is based on ventricular volume and radial artery pressure measurements, and used to reconstruct a single pressure-volume loop, which is then used to estimate Emax . Volume measurements are based on gated myocardial SPECT, whereas radial pressure is measured thro ...
... In (Kim et al., 1998) Emax estimation is based on ventricular volume and radial artery pressure measurements, and used to reconstruct a single pressure-volume loop, which is then used to estimate Emax . Volume measurements are based on gated myocardial SPECT, whereas radial pressure is measured thro ...
The electrocardiogram in normal and some abnormal conditions
... The Purkinje system distributes the excitatory wave in 5 to 10 milliseconds to all subendocardial parts of the ventricles. The question of the presence of intramural extension and the degree of intramural extension of the Purkinje network is not solved. In previous experiments, we gave only indirect ...
... The Purkinje system distributes the excitatory wave in 5 to 10 milliseconds to all subendocardial parts of the ventricles. The question of the presence of intramural extension and the degree of intramural extension of the Purkinje network is not solved. In previous experiments, we gave only indirect ...
Canadian Cardiovascular Society Atrial Fibrillation Guidelines 2010
... may be selected initially, the treatment strategy may change over time if the selected treatment strategy has been unsuccessful, as the arrhythmia progresses, or as the patient’s condition changes (Fig. 1).10 Thus, treatment strategies and their effectiveness, safety, and acceptability must be const ...
... may be selected initially, the treatment strategy may change over time if the selected treatment strategy has been unsuccessful, as the arrhythmia progresses, or as the patient’s condition changes (Fig. 1).10 Thus, treatment strategies and their effectiveness, safety, and acceptability must be const ...
Full version (PDF file)
... the assumption of Kozmann and Haraszti (2007) holds as well. After a linear baseline adjustment of the measured 64 ECG signals, in other 128 chest locations of the regular 192 measuring point arrangement, ECG signals were estimated following the principle and a transfer matrix for the 32 to 192 lead ...
... the assumption of Kozmann and Haraszti (2007) holds as well. After a linear baseline adjustment of the measured 64 ECG signals, in other 128 chest locations of the regular 192 measuring point arrangement, ECG signals were estimated following the principle and a transfer matrix for the 32 to 192 lead ...
Estrogen Receptor Я Protects the Murine Heart Against Left
... In our study, we divided the cardiac analysis of the animals in a total of 16 different groups, as shown in the Table. The different groups underwent either sham or TAC surgical procedures and were ovariectomized after E2 substitution. A complete phenotypic analysis of both cardiac and endocrine par ...
... In our study, we divided the cardiac analysis of the animals in a total of 16 different groups, as shown in the Table. The different groups underwent either sham or TAC surgical procedures and were ovariectomized after E2 substitution. A complete phenotypic analysis of both cardiac and endocrine par ...
Pacemaker Syndrome and Pacemaker Complications
... Undersensing: pacer incorrectly misses intrinsic depolarisation and paces despite intrinsic activity. This may be due to poor lead positioning, lead dislodgment, magnet application, low battery states, or myocardial infarction. Pacemaker tachycardia. Pacemaker syndrome: some patients with VVI pacema ...
... Undersensing: pacer incorrectly misses intrinsic depolarisation and paces despite intrinsic activity. This may be due to poor lead positioning, lead dislodgment, magnet application, low battery states, or myocardial infarction. Pacemaker tachycardia. Pacemaker syndrome: some patients with VVI pacema ...
Vassalos, A. and Lilley, S. and Young, D. and Peng, E. and
... systolic tissue Doppler parameters were reduced compared to normal controls; (2) Following cardiac surgery there was a reduction in TDI velocities and isovolumetric indices; (3) Reduced postoperative RV velocities were associated with a greater extent of myocardial injury as defined by Troponin-I re ...
... systolic tissue Doppler parameters were reduced compared to normal controls; (2) Following cardiac surgery there was a reduction in TDI velocities and isovolumetric indices; (3) Reduced postoperative RV velocities were associated with a greater extent of myocardial injury as defined by Troponin-I re ...
Clinical Slide Set. Atrial Fibrillation
... Intolerable symptoms despite hemodynamic stability For elective cardioversion when a monitored, outpatient setting is not availabl) For acute anticoagulation if very-high risk for stroke Telemetry monitoring during initiation of certain drugs ...
... Intolerable symptoms despite hemodynamic stability For elective cardioversion when a monitored, outpatient setting is not availabl) For acute anticoagulation if very-high risk for stroke Telemetry monitoring during initiation of certain drugs ...
Indices of Myocardial Contractility
... knows of the importance of inotrope—and the purpose of this missive is to define and discuss how to measure it—there is virtually no consensus on what change in inotrope is meaningful for patients. ...
... knows of the importance of inotrope—and the purpose of this missive is to define and discuss how to measure it—there is virtually no consensus on what change in inotrope is meaningful for patients. ...
Ejection fraction determination without planimetry by two
... views with image tracing and planimetry. To date, only one method has been described (10) that eliminates the need for planimetry. Despite good correlation with gated nuclear blood pool scanning and angiography, this method has certain limitations; it stiIl requires multiple views and does not direc ...
... views with image tracing and planimetry. To date, only one method has been described (10) that eliminates the need for planimetry. Despite good correlation with gated nuclear blood pool scanning and angiography, this method has certain limitations; it stiIl requires multiple views and does not direc ...
Managing Atrial Fibrillation - American College of Chest Physicians
... electrophysiologic, and biochemical changes all contribute to the initiation and perpetuation of AF. Almost any kind of structural heart disease can trigger the process that leads to AF. AF may have a hereditary component, especially when the onset occurs at an early age. Numerous inherited cardiac ...
... electrophysiologic, and biochemical changes all contribute to the initiation and perpetuation of AF. Almost any kind of structural heart disease can trigger the process that leads to AF. AF may have a hereditary component, especially when the onset occurs at an early age. Numerous inherited cardiac ...
S0735109712021377_mmc1
... source identified by fluoroscopy or digital atrial maps. Radiofrequency applications for FIRM ablation were made for 15 to 30 s at any given location, moving the catheter within the area indicated by maps to represent the rotor core or focal impulse origin, for a total ablation time of ≤10 minutes. ...
... source identified by fluoroscopy or digital atrial maps. Radiofrequency applications for FIRM ablation were made for 15 to 30 s at any given location, moving the catheter within the area indicated by maps to represent the rotor core or focal impulse origin, for a total ablation time of ≤10 minutes. ...
Perioperative right ventricular dysfunction
... transmitted through both the superior and inferior vena cava will increase the outflow pressure of vital organs such as the brain, kidney, gastrointestinal tract and the liver. Both conditions will result in tissue hypoperfusion. Another reason why right ventricular dysfunction could be associated w ...
... transmitted through both the superior and inferior vena cava will increase the outflow pressure of vital organs such as the brain, kidney, gastrointestinal tract and the liver. Both conditions will result in tissue hypoperfusion. Another reason why right ventricular dysfunction could be associated w ...
Catheter Ablation of Ventricular Tachycardia in Patients with Structural
... Catheter Ablation of Ventricular Tachycardia in Patients with Structural Heart Disease is an in–depth review of this still–expanding subject, presenting both updated information from the current literature and the personal experiences of the authors. The purpose of this book is to provide a comprehe ...
... Catheter Ablation of Ventricular Tachycardia in Patients with Structural Heart Disease is an in–depth review of this still–expanding subject, presenting both updated information from the current literature and the personal experiences of the authors. The purpose of this book is to provide a comprehe ...
Right ventricular reserve in a piglet model of chronic pulmonary hypertension
... ABSTRACT Right ventricular (RV) response to exercise or pharmacological stress is not well documented in pulmonary hypertension (PH). We investigated the relationship between RV reserve and ventricular–arterial coupling. Surgical ligation of the left pulmonary artery was performed in 13 Large White ...
... ABSTRACT Right ventricular (RV) response to exercise or pharmacological stress is not well documented in pulmonary hypertension (PH). We investigated the relationship between RV reserve and ventricular–arterial coupling. Surgical ligation of the left pulmonary artery was performed in 13 Large White ...
Ischemia-induced arrhythmia: the role of connexins, gap junctions, and
... Division of Cardiology, Department of Medicine, The Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA Received 10 June 2005; accepted 10 June 2005 ...
... Division of Cardiology, Department of Medicine, The Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA Received 10 June 2005; accepted 10 June 2005 ...
stratification, and prevention of sudden death Hypertrophic
... including arrhythmia, stroke, and sudden death.w7 A subanalysis of data from patients who had received an implantable cardioverter-defibrillator (ICD) indicated a higher proportion of individuals (40–50%) undergoing defibrillation in the age groups 11–20 years and > 55 years compared to the 21–55 ye ...
... including arrhythmia, stroke, and sudden death.w7 A subanalysis of data from patients who had received an implantable cardioverter-defibrillator (ICD) indicated a higher proportion of individuals (40–50%) undergoing defibrillation in the age groups 11–20 years and > 55 years compared to the 21–55 ye ...
ACLS Defibrillation Protocols
... also be made aware that anecdotal stories suggest that internal shocks delivered with the ZOLL RBW do not cause as much movement when the shock is delivered as was seen with monophasic waveforms. This should not be confused with failure to deliver the shock. If the heart does not restart after the i ...
... also be made aware that anecdotal stories suggest that internal shocks delivered with the ZOLL RBW do not cause as much movement when the shock is delivered as was seen with monophasic waveforms. This should not be confused with failure to deliver the shock. If the heart does not restart after the i ...
Atherosclerotic Heart Disease, Conduction Disturbances, and
... Case 2 Jill 64 year-old woman diagnosed with atrial fibrillation six months ago. It is persistent Initially cardioverted with relapse. One attempt at ablation failed after five weeks. Hypertensive with borderline blood pressure on medications but no other cardiovascular risk factors. ECG voltage in ...
... Case 2 Jill 64 year-old woman diagnosed with atrial fibrillation six months ago. It is persistent Initially cardioverted with relapse. One attempt at ablation failed after five weeks. Hypertensive with borderline blood pressure on medications but no other cardiovascular risk factors. ECG voltage in ...
Predictors of Increased Left Ventricular Filling Pressure in Dialysis
... the best correlate of LV filling pressure (10) in heart failure patients and one of the best predictors of outcome in patients with heart failure (13,26), myocardial infarction (27), and end-stage renal disease (28). It was also recommended by European Society of Cardiology as a variable to non-inva ...
... the best correlate of LV filling pressure (10) in heart failure patients and one of the best predictors of outcome in patients with heart failure (13,26), myocardial infarction (27), and end-stage renal disease (28). It was also recommended by European Society of Cardiology as a variable to non-inva ...
Microtubule Involvement in the Adaptation to Altered Mechanical
... congenital cardiac malformations, most single-gene models of congenital heart disease display a wide variation in phenotype, suggesting an important role for modifying genes as well as epigenetic or environmental factors.6 – 8 Experimental interventions that increase or decrease mechanical load duri ...
... congenital cardiac malformations, most single-gene models of congenital heart disease display a wide variation in phenotype, suggesting an important role for modifying genes as well as epigenetic or environmental factors.6 – 8 Experimental interventions that increase or decrease mechanical load duri ...
Adverse Effect of Ventricular Pacing on Heart Failure and
... was assessed by means of Cox proportional hazards models,5 with time to event as the dependent variable and Cum%VP as a timedependent covariate. HFH models were extended to include multiple HFHs by use of Cox models that allow multiple events per patient.6 Both unadjusted models (Cum%VP as the only ...
... was assessed by means of Cox proportional hazards models,5 with time to event as the dependent variable and Cum%VP as a timedependent covariate. HFH models were extended to include multiple HFHs by use of Cox models that allow multiple events per patient.6 Both unadjusted models (Cum%VP as the only ...
Ventricular fibrillation: evolution of the multiple
... the myocardium, forming non-sustained re-entry loops. Occasionally, wavelets disappear when they collide with another wavelet or with the boundary. They can also break up, producing daughter wavelets after they encounter refractory cells. Moe’s simulations showed that such irregular activity can be ...
... the myocardium, forming non-sustained re-entry loops. Occasionally, wavelets disappear when they collide with another wavelet or with the boundary. They can also break up, producing daughter wavelets after they encounter refractory cells. Moe’s simulations showed that such irregular activity can be ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.