Reduced arrhythmogenicity of biphasic vs. monophasic T wave shocks: Implications for defibrillation efficacy
نویسندگان
چکیده
منابع مشابه
Effects of polarity for monophasic and biphasic shocks on defibrillation efficacy with an endocardial system.
Electrode polarity has been reported to be one of the factors that affect defibrillation efficacy. We studied the influence of polarity on defibrillation efficacy when monophasic and biphasic waveforms were used with an endocardial lead system. In six anesthetized pigs, defibrillation catheters were placed in the right ventricular (RV) apex and at the junction of the superior vena cava (SVC) an...
متن کاملMulticenter comparison of truncated biphasic shocks and standard damped sine wave monophasic shocks for transthoracic ventricular defibrillation. Transthoracic Investigators.
BACKGROUND The most important factor for improving out-of-hospital ventricular fibrillation survival rates is early defibrillation. This can be achieved if small, lightweight, inexpensive automatic external defibrillators are widely disseminated. Because automatic external defibrillator size and cost are directly affected by defibrillation waveform shape and because of the favorable experience ...
متن کاملBiphasic shocks compared with monophasic damped sine wave shocks for direct ventricular defibrillation during open heart surgery.
BACKGROUND Biphasic waveform shocks are more effective than monophasic shocks for transchest ventricular defibrillation, atrial cardioversion, and defibrillation with implantable defibrillators but have not been studied for open chest, intraoperative defibrillation. This prospective, blinded, randomized clinical study compares biphasic and monophasic shock effectiveness and establishes intraope...
متن کاملEpicardial mapping of ventricular defibrillation with monophasic and biphasic shocks in dogs.
To study the mechanism of defibrillation and the reason for the increased defibrillation efficacy of biphasic waveforms, the potential gradient in a 32 x 30-mm region of the right ventricle in 15 dogs was progressively lowered in four steps while a strong potential gradient field was maintained throughout the rest of the ventricular myocardium. The volume of right ventricle beneath the plaque w...
متن کاملSuperiority of biphasic over monophasic defibrillation shocks is attributable to less intracellular calcium transient heterogeneity.
OBJECTIVES The purpose of this study was to test the hypothesis that superiority of biphasic waveform (BW) over monophasic waveform (MW) defibrillation shocks is attributable to less intracellular calcium (Ca(i)) transient heterogeneity. BACKGROUND The mechanism by which BW shocks have a higher defibrillation efficacy than MW shocks remains unclear. METHODS We simultaneously mapped epicardi...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1996
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(96)80813-8