منابع مشابه
Electrical restitution hysteresis: good memory or delayed response?
The action potential duration (APD) of ventricular myocytes depends on the length of the preceding diastolic interval (DI) in a relationship termed “electrical restitution.” The APD shortens with decreasing cycle length and thus with decreasing DI.1 The teleological advantage of this phenomenon is that it provides increased time for excitation-contraction coupling at long cycle lengths while pr...
متن کاملElectrical restitution and spatiotemporal organization during ventricular fibrillation.
Despite recent advances in our understanding of the mechanism for ventricular fibrillation (VF), important electrophysiological aspects of the development of VF still are poorly defined. It has been suggested that the onset of VF involves the disintegration of a single spiral wave into many self-perpetuating waves. It has been further suggested that such a process requires that the slope of the...
متن کاملEffect of -adrenergic blockade on dynamic electrical restitution in vivo
Hao, Steven C., David J. Christini, Kenneth M. Stein, Peter N. Jordan, Sei Iwai, Orville Bramwell, Steven M. Markowitz, Suneet Mittal, and Bruce B. Lerman. Effect of -adrenergic blockade on dynamic electrical restitution in vivo. Am J Physiol Heart Circ Physiol 287: H390–H394, 2004. First published March 4, 2004; 10.1152/ajpheart.00749.2003.—The slope of the action potential duration (APD) rest...
متن کاملElectrical restitution, critical mass, and the riddle of fibrillation.
The elusive riddle of ventricular fibrillation (VF) has been approached from many creative angles. The latest, presented by Wu et al in this issue of the journal [1], examines the effects of restitution properties on the “critical mass” i.e., the minimum size of cardiac tissue capable of sustaining fibrillation. What is noteworthy about this novel effort is that the very basis for the working h...
متن کاملRestitution of reaching and grasping promoted by functional electrical therapy.
Functional electrical therapy (FET) is a new term describing a combination of functional electrical stimulation that generates life-like movement and intensive exercise in humans with central nervous system lesions. We hypothesized that FET can promote a significant recovery of functioning if applied in subacute stroke subjects. The study included 16 stroke subjects divided into a low functioni...
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ژورنال
عنوان ژورنال: Circulation Research
سال: 2004
ISSN: 0009-7330,1524-4571
DOI: 10.1161/01.res.0000124605.03595.e4