808-3 Reentrant Wavefronts During Wiggers’ Stage II Ventricular Fibrillation in Dogs
نویسندگان
چکیده
منابع مشابه
Action Potentials During Ventricular Fibrillation in Dogs
This study determined the response of action potentials during ventricular fibrillation (VF) to timed monophasic and biphasic shocks. A floating glass microelectrode was used to record intracellularly from the anterior right ventricle in 10 open-chest dogs. After 10 seconds of electrically induced VF, 5-millisecond monophasic and 2.5/2.5-millisecond biphasic shocks or 16-millisecond monophasic ...
متن کاملEpicardial wavefronts arise from widely distributed transient sources during ventricular fibrillation in the isolated swine heart.
It has been proposed that VF waves emanate from stable localized sources, often called "mother rotors." However, evidence for the existence of these rotors is conflicting. Using a new panoramic optical mapping system that can image nearly the entire ventricular epicardium, we recently excluded epicardial mother rotors as the drivers of Wiggers' stage II VF in the isolated swine heart. Furthermo...
متن کاملThe mechanism of termination of reentrant activity in ventricular fibrillation.
The reentrant wave fronts in ventricular fibrillation (VF) have only a limited life span. The mechanisms by which these reentrant wave fronts terminate are unknown. We performed computerized mapping studies in six open-chest dogs before and after right ventricular subendocardial ablation with Lugol's solution. Recordings were made with 56 bipolar electrodes separated by 3 mm. Baseline pacing wa...
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Mrs. Heidari, 53 developed ventricular fibrillation and cardiopulmonary arrest after receiving 15 mL lidocaine 2% for local anesthesia at the Dr. Shariati Hospital Cathlab. There was no identified risk factor for her arrest preoperatively. She had a history of exertional chest pain for about 5 years and an electrocardiogram showed only inverted T-waves at the time of angiography. The case i...
متن کاملComparison of activation during ventricular fibrillation and following unsuccessful defibrillation shocks in open-chest dogs.
The purpose of this study was to map in detail the spread of activation away from sites of early postshock excitation following unsuccessful defibrillation to determine whether these activation fronts are the unaltered continuation of activation fronts present just before the shock. We recorded simultaneously from 120 bipolar electrodes on 40 plunge needles in a 20 x 35 x 5-mm volume of tissue ...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1995
ISSN: 0735-1097
DOI: 10.1016/0735-1097(95)93221-w