Systolic and Diastolic Heart Failure: Differences and Similarities Review Articles
... function and diastolic dysfunction from impaired ventricular relaxation, compliance or filling are not always associated with clinical heart failure characterized by signs and symptoms of low cardiac output or of congestion. Furthermore, in SHF, diastolic dysfunction as assessed by changes in the ve ...
... function and diastolic dysfunction from impaired ventricular relaxation, compliance or filling are not always associated with clinical heart failure characterized by signs and symptoms of low cardiac output or of congestion. Furthermore, in SHF, diastolic dysfunction as assessed by changes in the ve ...
Tachycardia - UW Blogs Network
... Reentry is another general mechanism for tachyarrhythmia. Reentry may occur when an electrical impulse encounters separate and electrophysiologically distinct pathways that are anatomically connected at both ends as shown below. In this example (Figure 1), a wave of depolarization (impulse for short ...
... Reentry is another general mechanism for tachyarrhythmia. Reentry may occur when an electrical impulse encounters separate and electrophysiologically distinct pathways that are anatomically connected at both ends as shown below. In this example (Figure 1), a wave of depolarization (impulse for short ...
Doppler Echocardiography in Dilated Cardiomyopathy: Diastolic
... diastole [1]. Several studies have revealed a higher correlation between clinical status and echocardiographic parameters, reflecting entirely diastolic dysfunction (E and A deceleration time) and including the disadvantage that pure diastolic parameters are more influenced by heart rate and mitral ...
... diastole [1]. Several studies have revealed a higher correlation between clinical status and echocardiographic parameters, reflecting entirely diastolic dysfunction (E and A deceleration time) and including the disadvantage that pure diastolic parameters are more influenced by heart rate and mitral ...
Cardiac Resynchronization Therapy in 2015
... reverse remodeling [46], peak Vo2, and natriuretic peptides [47] have been considered but have significant limitations that render them inadequate as potential surrogates. ...
... reverse remodeling [46], peak Vo2, and natriuretic peptides [47] have been considered but have significant limitations that render them inadequate as potential surrogates. ...
Echocardiographic Assessment of Right Ventricular Diastolic
... from May to November 2006 at the Philippine Heart Center. Clinico-demographics as well as echocardiographic studies with emphasis on the right ventricular function were obtained. RV diastolic indices, such as Tricuspid Inflow E Velocity, A velocity, E/A ratio, Tricuspid deceleration Time, Isovolumic ...
... from May to November 2006 at the Philippine Heart Center. Clinico-demographics as well as echocardiographic studies with emphasis on the right ventricular function were obtained. RV diastolic indices, such as Tricuspid Inflow E Velocity, A velocity, E/A ratio, Tricuspid deceleration Time, Isovolumic ...
Perioperative assessment of left ventricular function in patients with
... to examine the extent and significance of impairment in left ventricular function in 20 patients with rheumatic mitral stenosis. Indices of left ventricular performance normalised mean rate of circumferential fibre shortening (Vcf), ejection fraction, normalised posterior wall velocity, and stroke v ...
... to examine the extent and significance of impairment in left ventricular function in 20 patients with rheumatic mitral stenosis. Indices of left ventricular performance normalised mean rate of circumferential fibre shortening (Vcf), ejection fraction, normalised posterior wall velocity, and stroke v ...
The Sequence of Normal Recovery of Excitability in the
... and by the most detailed studies of human heart excitation." The shorter time required for a portion of endocardial excitation means activation sequence at that location has relatively little influence on recovery time. The organization of intrinsic recovery properties therefore becomes the major de ...
... and by the most detailed studies of human heart excitation." The shorter time required for a portion of endocardial excitation means activation sequence at that location has relatively little influence on recovery time. The organization of intrinsic recovery properties therefore becomes the major de ...
Acute Myocardial Infarction: A Century of Progress
... concert with fibrinolytic reperfusion were associated with reduction of reinfarction and of recurrent myocardial ischemia (Roberts et al., 1971). An important step was taken by the ISIS Study Group which showed in 1988 that both streptokinase and the antiplatelet agent, aspirin, each independently r ...
... concert with fibrinolytic reperfusion were associated with reduction of reinfarction and of recurrent myocardial ischemia (Roberts et al., 1971). An important step was taken by the ISIS Study Group which showed in 1988 that both streptokinase and the antiplatelet agent, aspirin, each independently r ...
Anisotropic Reinforcement of Acute Anteroapical Infarcts Improves
... consistently show that these approaches reduce or limit LV dilation and subsequent functional deterioration but do not improve LV pump function acutely.7,15,20,21 We therefore sought to develop a complementary therapeutic approach that could improve LV pump function early after a large MI. Normal my ...
... consistently show that these approaches reduce or limit LV dilation and subsequent functional deterioration but do not improve LV pump function acutely.7,15,20,21 We therefore sought to develop a complementary therapeutic approach that could improve LV pump function early after a large MI. Normal my ...
Brief pressure overload of the left ventricle reduces myocardial
... for 3 hours. Reperfusion was confirmed by refilling the coronary artery and visualizing a reactive hyperemic response. No anti-arrhythmic agents were given at any time. The arterial pressure, heart rate, electrocardiography, and the left ventricular pressure were recorded simultaneously and continuo ...
... for 3 hours. Reperfusion was confirmed by refilling the coronary artery and visualizing a reactive hyperemic response. No anti-arrhythmic agents were given at any time. The arterial pressure, heart rate, electrocardiography, and the left ventricular pressure were recorded simultaneously and continuo ...
Evaluation of Several Geometric Models for Estimation of Left
... were used to alter the left ventricular pressure, size, and output to provide a wide range of hemodynamic conditions for analysis: nitroglycerin 0.8—1.2 mg, phenylephrine 10-20 ^ig/kg min"1, and isoproterenol 0.3 fig/kg min-1. Data were recorded during a control period prior to the intervention and ...
... were used to alter the left ventricular pressure, size, and output to provide a wide range of hemodynamic conditions for analysis: nitroglycerin 0.8—1.2 mg, phenylephrine 10-20 ^ig/kg min"1, and isoproterenol 0.3 fig/kg min-1. Data were recorded during a control period prior to the intervention and ...
Digitalis Toxicity: A Fading but Crucial Complication to Recognize
... take 7-10 days (length of 4-5 half-lives). The drug is extensively distributed into fat, making dialysis ineffective in digitalis toxicity. In patients with end-stage renal disease, the half life can be as long as 4-6 days.15,16 Concomitant metabolic disorders or medications also can increase digoxi ...
... take 7-10 days (length of 4-5 half-lives). The drug is extensively distributed into fat, making dialysis ineffective in digitalis toxicity. In patients with end-stage renal disease, the half life can be as long as 4-6 days.15,16 Concomitant metabolic disorders or medications also can increase digoxi ...
Digitalis Toxicity: A Fading but Crucial Complication to Recognize REVIEW
... take 7-10 days (length of 4-5 half-lives). The drug is extensively distributed into fat, making dialysis ineffective in digitalis toxicity. In patients with end-stage renal disease, the half life can be as long as 4-6 days.15,16 Concomitant metabolic disorders or medications also can increase digoxi ...
... take 7-10 days (length of 4-5 half-lives). The drug is extensively distributed into fat, making dialysis ineffective in digitalis toxicity. In patients with end-stage renal disease, the half life can be as long as 4-6 days.15,16 Concomitant metabolic disorders or medications also can increase digoxi ...
Differential expression of TNF-, IL-6, and IGF
... examine the effects of moderate (15 mmHg) and severe (35 mmHg) mechanical stretch on the time course (from 0 to 60 min) of myocardial expression of tumor necrosis factor (TNF)-␣, interleukin (IL)-6, and insulin-like growth factor (IGF)-1 and their cognate receptors. After 10 min of moderate stretch, ...
... examine the effects of moderate (15 mmHg) and severe (35 mmHg) mechanical stretch on the time course (from 0 to 60 min) of myocardial expression of tumor necrosis factor (TNF)-␣, interleukin (IL)-6, and insulin-like growth factor (IGF)-1 and their cognate receptors. After 10 min of moderate stretch, ...
Purkinje repolarization as a possible cause of the U wave
... The sinus rate remained stable at 200 beats per minute throughout the procedure. In the control record, the T wave was of low amplitude. What appears to be the second peak of a bifid T may well be a U wave. After hypokalemia was produced, the QRS amplitude was increased. The ST segment was depressed ...
... The sinus rate remained stable at 200 beats per minute throughout the procedure. In the control record, the T wave was of low amplitude. What appears to be the second peak of a bifid T may well be a U wave. After hypokalemia was produced, the QRS amplitude was increased. The ST segment was depressed ...
Mitochondria Oxidative Stress, Connexin43 Remodeling, and
... Angiotensin-II activation increases reactive oxygen species (ROS) production, and ACE8/8 mice show increased cardiac ROS. We sought to determine the source of ROS and whether ROS played a role in the arrhythmogenesis. Methods and Results—Wild-type and ACE8/8 mice with and without 2 weeks of treatmen ...
... Angiotensin-II activation increases reactive oxygen species (ROS) production, and ACE8/8 mice show increased cardiac ROS. We sought to determine the source of ROS and whether ROS played a role in the arrhythmogenesis. Methods and Results—Wild-type and ACE8/8 mice with and without 2 weeks of treatmen ...
Left Ventricular Diastolic Function Is Closely Associated With
... this partly explains why this arrhythmia is a major cause of population morbidity and mortality.4,5 The reverse seems to be also true: impaired function of the heart, especially that of the ventricles, debilitates the atria, because the left atrium (LA) and the left ventricle (LV) are intricately co ...
... this partly explains why this arrhythmia is a major cause of population morbidity and mortality.4,5 The reverse seems to be also true: impaired function of the heart, especially that of the ventricles, debilitates the atria, because the left atrium (LA) and the left ventricle (LV) are intricately co ...
Echocardiographic Evaluation of Left Ventricular Diastolic Function
... pattern in healthy neonates. Aa velocity greater than Ea velocity is observed in fullterm fetuses (20,21). Sequential TDI of same fetuses has shown progressive increase in Ea velocity without change in Aa velocity (21). Pulsed Doppler study of diastolic filling patterns in fetuses has shown that E-w ...
... pattern in healthy neonates. Aa velocity greater than Ea velocity is observed in fullterm fetuses (20,21). Sequential TDI of same fetuses has shown progressive increase in Ea velocity without change in Aa velocity (21). Pulsed Doppler study of diastolic filling patterns in fetuses has shown that E-w ...
Three-Dimensional Cardiac Electrical Imaging From Intracavity
... meshes. The FE model was obtained by meshing the integrated NURBS geometry model. The heart-torso-catheter FE model was made up of 20 423 nodes and 118 660 first-order tetrahedral elements. The tetrahedral elements within the myocardium and the blood mass had finer resolution as compared to other ar ...
... meshes. The FE model was obtained by meshing the integrated NURBS geometry model. The heart-torso-catheter FE model was made up of 20 423 nodes and 118 660 first-order tetrahedral elements. The tetrahedral elements within the myocardium and the blood mass had finer resolution as compared to other ar ...
Mechanically induced sudden death in chest wall impact
... changes (S-T segment abnormalities) were reported and VF was occasionally seen (Schlomka, 1934). The force of the blow was quantified only subjectively; most blows were of sufficient strength to cause readily evident cardiac damage. Severing or blocking the vagus nerve had no effect on the ECG or surv ...
... changes (S-T segment abnormalities) were reported and VF was occasionally seen (Schlomka, 1934). The force of the blow was quantified only subjectively; most blows were of sufficient strength to cause readily evident cardiac damage. Severing or blocking the vagus nerve had no effect on the ECG or surv ...
Temporary epicardial pacing after cardiac surgery
... The pulse generator has a sensing ‘timing cycle’, which is determined by the rate set on the pacemaker. If no endogenous depolarisation is sensed by the end of this timing cycle, a pacing spike is delivered to the atrium. However, if an endogenous depolarisation is sensed, no spike is delivered, and ...
... The pulse generator has a sensing ‘timing cycle’, which is determined by the rate set on the pacemaker. If no endogenous depolarisation is sensed by the end of this timing cycle, a pacing spike is delivered to the atrium. However, if an endogenous depolarisation is sensed, no spike is delivered, and ...
LEFT VENTRICULAR DIASTOLIC FUNCTIONAL STATUS AFTER
... IVRT, and E/Ea Ratio. The improvement in LV diastolic function indices was also parallel to the increase in LV systolic function assessed by increase in LV ejection fraction. Regardless of LV systolic dysfunction, LV diastolic dysfunction is a serious determinant for cardiac-related mortality and mo ...
... IVRT, and E/Ea Ratio. The improvement in LV diastolic function indices was also parallel to the increase in LV systolic function assessed by increase in LV ejection fraction. Regardless of LV systolic dysfunction, LV diastolic dysfunction is a serious determinant for cardiac-related mortality and mo ...
morphometric and biochemical characteristics of ventricular
... rather than peripherally in the myocyte, even mild hypertrophy might increase diffusion distances sufficiently to restrict aerobic energy metabolism and to inhibit contractility. Cellular function may also be influenced by transverse cell shape, which determines effective diffusion distances for sma ...
... rather than peripherally in the myocyte, even mild hypertrophy might increase diffusion distances sufficiently to restrict aerobic energy metabolism and to inhibit contractility. Cellular function may also be influenced by transverse cell shape, which determines effective diffusion distances for sma ...
Swimming exercise reverses aging-related contractile abnormalities
... Background: The objective of this study was to examine the effect of swimming exercise on aging-related Ca2+ handling alterations and structural abnormalities of female rat heart. Methods: For this purpose, 4-month and 24-month old female rats were used and divided into three following groups: seden ...
... Background: The objective of this study was to examine the effect of swimming exercise on aging-related Ca2+ handling alterations and structural abnormalities of female rat heart. Methods: For this purpose, 4-month and 24-month old female rats were used and divided into three following groups: seden ...
proforma for registration of subjects for dissertation
... result of thrombosis, or development of coronary spasm. It is well known that myocardial ischemia results in the loss of contractile function and produces myocardial damage as a consequence of cell death.1 Oxygen-free radical formation and intracellular Ca2+ overload are strongly implicated as impor ...
... result of thrombosis, or development of coronary spasm. It is well known that myocardial ischemia results in the loss of contractile function and produces myocardial damage as a consequence of cell death.1 Oxygen-free radical formation and intracellular Ca2+ overload are strongly implicated as impor ...
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.