Encircling overlapping multipulse shock waveforms for transthoracic defibrillation
نویسندگان
چکیده
منابع مشابه
Transthoracic Ventricular Defibrillation with Triangular and Trapezoidal Waveforms
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 کاملTransthoracic Defibrillation
To improve survival rates in patients undergoing surgical ablative procedures for malignant ventricular tachycardia (VT), a frequent practice is to implant epicardial patch electrodes at the time of map-guided surgery. After operation, patients with inducible VT often receive an automatic internal cardioverter/defibrillator (AICD) implant, whereas patients with noninducible VT usually do not. I...
متن کاملVentricular 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 کاملHypothesis for low-energy transthoracic defibrillation.
timely and informative. The Belfast group has a prodigious experience in out-of-hospital resuscitation and their prospectively collected data have been invaluable in determining energy requirements for defibrillation. The evidence indicating the need for defibrillators storing more than 400 Ws is, at present, inadequate and unconvincing (Lown et al., 1978). In addition to the views expressed by...
متن کاملA New Waveform for Transthoracic Defibrillation
Background A directionally changing shock electrical vector could facilitate defibrillation by depolarizing myocytes with different orientations vis-A-vis the shock field. Such a changing vector can be achieved by a new waveform for transthoracic defibrillation: overlapping sequential pulses. Our purpose was to evaluate this waveform. Methods and Results Ventricular fibrillation was induced in ...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1998
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(98)00486-0