I T is a noteworthy fact that the hearts (ventricles) of large animals fibrillate with great ease and only rarely recover from the fibrillary state, while small hearts rarely fail to recover. It was noted by McWilliam 2 that “spontaneous recovery may take place readily in the hearts of the cat, rabbit, rat, mouse, hedgehog, and fowl.” The ventricles of dogs do not usually recover spontaneously ...

With advances in pediatric cardiology and cardiac surgery, the population of adults with congenital heart disease (CHD) has increased. In the current era, there are more adults with CHD than children. This population has many unique issues and needs. They have distinctive forms of heart failure and their cardiac disease can be associated with pulmonary hypertension, thromboemboli, complex arrhy...

Oxidative phosphorylation was measured polarographically in mitochondria isolated from normal ventricles and from the ventricles of guinea pigs and cats with experimental heart failure produced by constriction of the aorta or pulmonary artery. The presence of heart failure was proved by the study of myocardial mechanics in vitro, by cardiac catheterization, and by post-mortem examination. Mitoc...

The endothermic state of mammals and birds requires high heart rates to accommodate the high rates of oxygen consumption. These high heart rates are driven by very similar conduction systems consisting of an atrioventricular node that slows the electrical impulse and a His-Purkinje system that efficiently activates the ventricular chambers. While ectothermic vertebrates have similar contraction...

Heart failure continues to cause major morbidity and mortality in the United States and worldwide. As operative techniques and immunosuppression have improved over the last several decades, orthotopic cardiac transplantation has become the preferred alternative for treatment of end-stage heart failure. However, a lack of an adequate supply of donors, the problems of chronic rejection, as well a...

BACKGROUND We have shown previously that norepinephrine (NE) uptake activity is reduced in the failing right ventricle of animals with right heart failure (RHF) produced by tricuspid avulsion and progressive pulmonary constriction. However, it is unknown whether this defect in neuronal NE uptake is related to reduction of noradrenergic nerve terminals or whether these changes also occur in anim...

Energy of the cardiac muscle largely depends on fatty acid oxidation. It is known that the atrium and ventricle have chamber-specific functions, structures, gene expressions, and pathologies. The left ventricle works as a high-pressure chamber to pump blood toward the body, and its muscle wall is thicker than those of the other chambers, suggesting that energy utilization in each of the chamber...

7 2 1 8 | P a g e c o u n c i l f o r I n n o v a t i v e R e s e a r c h A u g u s t 2 0 1 6 w w w . c i r w o r l d . c o m Factors Affecting the Segmentation of the Heart Ventricles in Short Axis Cardiac Perfusion MRI Images Doaa Mousa Nourhan Zayed, Inas A. Yassine Computers and Systems Department, Electronics Research Institute, Cairo, Egypt [email protected] Computers and Systems Depart...

Techniques (push-pull cannula, cup, brain ventricles perfusion) allowing estimation of the amount of the ACh released in vivo from the brain are described. The main attention is paid to biochemical, physiological and morphological factors influencing the amount of ACh released and available for estimation. Conditions of experiments for each of these techniques are described in details. The amou...