نتایج جستجو برای: ventricular fibrillation

تعداد نتایج: 191527  

2005
John B. Newell

Background. Ventricular fibrillation has deleterious metabolic and functional consequences for the heart. This study had two purposes: first, to define the effects of ventricular fibrillation during hypoxia on energy metabolism and accumulation of intracellular Na' and, second, to test whether the occurrence of ventricular fibrillation can be predicted from functional or metabolic parameters. M...

Journal: :Circulation research 2015
Marc W Deyell Andrew D Krahn Jeffrey J Goldberger

Arrhythmic sudden cardiac death (SCD) may be caused by ventricular tachycardia/fibrillation or pulseless electric activity/asystole. Effective risk stratification to identify patients at risk of arrhythmic SCD is essential for targeting our healthcare and research resources to tackle this important public health issue. Although our understanding of SCD because of pulseless electric activity/asy...

2006
Raymond E. Ideker Jack M. Rogers

Amajor controversy in cardiac electrophysiology is whether ventricular fibrillation (VF) is maintained by wandering wavelets or mother rotors. On the basis of a computer model of atrial fibrillation by Moe1 developed in 1962, fibrillation was hypothesized to be maintained by multiple small, wandering wavelets, in which the activation pattern is constantly changing. According to the wandering wa...

Journal: :Progress in biophysics and molecular biology 2003
Mark S Link

Sudden death due to nonpenetrating chest wall impact in the absence of injury to the ribs, sternum and heart is known as commotio cordis. Although once thought rare, an increasing number of these events have been reported. Indeed, a significant percentage of deaths on the athletic field are due to chest wall impact. Commotio cordis is most frequently observed in young individuals (age 4-18 year...

Journal: :Circulation 1986
P S Chen N Shibata E G Dixon R O Martin R E Ideker

To examine the relationship between the defibrillation threshold and the strength of shocks that induce ventricular fibrillation during the vulnerable period, we determined the defibrillation threshold in 22 open-chest dogs using epicardial defibrillation electrodes with the cathode at the ventricular apex and the anode at the right atrium. We also determined whether there was an upper limit of...

2016
LI LI YUAN-LI ZHOU XUE-JING ZHANG HUA-TING WANG

The present study reports a case of electrical storm occurring in a 43-year-old woman with dilated cardiomyopathy. The patient suffered from a cardiac electrical storm, with 98 episodes of ventricular tachycardia rapidly degenerating to ventricular fibrillation in hospital. The patient was converted with a total of 120 defibrillations. Recurrent ventricular tachycardia/fibrillation was initiate...

2009
Seung-Yul Lee Jin-Bae Kim Eui Im Woo-In Yang Boyoung Joung Moon-Hyoung Lee Sung-Soon Kim

Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a familial cardiac arrhythmia that is related to RYR2 or CASQ2 gene mutation. It occurs in patients with structurally normal heart and causes exercise-emotion-triggered syncope and sudden cardiac death. We experienced a case of CPVT in an 11 year-old female patient who was admitted for sudden cardiovascular collapse. The initial el...

Journal: :Thorax 1952
I K R MCMILLAN F B COCKETT P STYLES

Ventricular fibrillation is an incoordinated type of contraction which produces no useful beats. The typical rippling movements of the ventricular muscle are unmistakable when seen or felt with the hand directly on the heart. The treatment of a heart that has stopped is cardiac massage and adequate oxygenation. The treatment of ventricular fibrillation which we recommend is, first, massage to m...

2010
Hyung Tae Kim Jun Hak Lee Il Bong Park Hyeon Eon Heo Tae Yoon Kim Myeong Jong Lee

Long QT syndrome (LQTS) is an arrhythmogenic cardiovascular disorder resulting from mutations in cardiac ion channels. LQTS is characterized by prolonged ventricular repolarization and frequently manifests itself as QT interval prolongation on the electrocardiogram (ECG). A variety of commonly prescribed anesthetic drugs possess the adverse property of prolonging cardiac repolarization and may ...

Journal: :The Journal of clinical investigation 1978
P B Corr F X Witkowski B E Sobel

Continuously recorded bipolar electrograms were obtained simultaneously from epi-, endo-, and mid-myocardial regions of the ischemic and normal zones of cat left ventricle in vivo after coronary occlusion, analyzed by computer, and compared to regional cyclic AMP levels. Regional cyclic AMP content was used as an index of the combined local effects of: (a) efferent sympathetic nerve discharge; ...

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