title: Reduction of energy required for defibrillation by delivering shocks in orthogonal directions in the dog.
abstract: Reduction of energy required to defibrillate (ERD) seems to represent a necessary condition for intensive development of implantable defibrillator, so as for minimization of cardiac and pulmonary damages provoked by high energy transthoracic defibrillation electric shocks. The present work describes a defibrillation method using shocks delivered in orthogonal directions and separated by a 100 ms delay. Defibrillation threshold measured with classical unidirectional shocks on 30 dogs has been found to be 286.8 +/- 22.2 joules. In the same animals, defibrillation threshold measured by use of orthogonal shocks has been found to be 101.4 +/- 14.9 joules. We conclude that this crossed shocks method leads to a substantial reduction of ERD (64%).
authors: Institut National de la Santé et de la Recherche Médicale (INSERM) Unité 256, Hôpital Broussais, Paris, France.
authors: A L
authors: AL
authors: Bardou
authors: J
authors: J
authors: Degonde
authors: P J
authors: PJ
authors: Birkui
authors: P
authors: P
authors: Auger
authors: J M
authors: JM
authors: Chesnais
authors: M
authors: M
authors: Duriez
mesh_terms: D000818:Animals; D004285:Dogs; D004554:Electric Countershock / Q000295:instrumentation / Q000379:methods*; D004560:Electricity; D014693:Ventricular Fibrillation / Q000517:prevention & control*