Ventricular Defibrillation With Triphasic Waveforms
نویسندگان
چکیده
منابع مشابه
Ventricular defibrillation with triphasic waveforms.
BACKGROUND It has been reported that triphasic defibrillation waveforms cause less myocardial injury than biphasic waveforms. This study compared the defibrillation thresholds (DFTs) of triphasic and biphasic waveforms. METHODS AND RESULTS ++DFTs were determined for a transvenous lead system and a 300-microF-capacitor defibrillator. In 8 pigs (group 1), DFTs were determined for 5 triphasic wa...
متن کاملSimultaneous Comparison of Many Triphasic Defibrillation Waveforms
Biphasic defibrillation waveforms are now accepted as being more effective at terminating ventricular fibrillation (VF) than monophasic waveforms. If two phases are better than one, this naturally leads to the hypothesis that additional phases improve efficacy. This study tests the hypothesis by adding one additional phase. We examined the efficacy of 18 different triphasic waveforms simultaneo...
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From 7,200 fibrillation-defibrillation episodes in anesthetized dogs, the effectiveness of 6 classes of unidirectional shocks in reversing ventricular fibrillation of 30-sec duration was determined. The shocks lasted for 1 to 256 msec. Three waveforms (ascending ramp triangular, descending ramp triangular, and trapezoidal) were studied at peak currents of 10 amp and 20 amp. Families of curves o...
متن کاملImproved safety factor for triphasic defibrillator waveforms.
Newly developed biphasic waveforms improve defibrillation efficacy both by reduction of defibrillation threshold and by amelioration of shock-induced dysfunction depending on the relative shape of the first and second pulses. Each of these independent effects improves the waveform's safety factor, the ratio between the shock intensity that produces a specific degree of postshock dysfunction and...
متن کاملThe influence of ventricular fibrillation duration on defibrillation efficacy using biphasic waveforms in humans.
OBJECTIVES The purpose of this study was to prospectively investigate the influence of ventricular fibrillation (VF) durations of 5, 10 and 20 s on the defibrillation threshold (DFT) during implantable cardioverter-defibrillator (ICD) implantation. BACKGROUND Although the DFT using monophasic waveforms has been shown to increase with VF duration in humans, the effect of VF duration on defibri...
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ژورنال
عنوان ژورنال: Circulation
سال: 2000
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.101.11.1324