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Titolo:
Does electrode polarity alter the energy requirements for transthoracic biphasic waveform defibrillation? Experimental studies
Autore:
Karlsson, G; Zhang, Y; Davies, LR; Coddington, W; Kerber, RE;
Indirizzi:
Univ Iowa Hosp & Clin, Ctr Cardiovasc, Dept Internal Med, Iowa City, IA 52242 USA Univ Iowa Hosp & Clin Iowa City IA USA 52242 Med, Iowa City, IA 52242 USA
Titolo Testata:
RESUSCITATION
fascicolo: 1, volume: 51, anno: 2001,
pagine: 77 - 81
SICI:
0300-9572(200110)51:1<77:DEPATE>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSVENOUS LEAD SYSTEM; SHOCK POLARITY; EFFICACY; THRESHOLDS; REVERSAL; HUMANS;
Keywords:
defibrillation; transthoracic impedance; ventricular fibrillation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Kerber, RE Univ Iowa Hosp & Clin, Ctr Cardiovasc, Dept Internal Med, 200 Hawkins Dr, Iowa City, IA 52242 USA Univ Iowa Hosp & Clin 200 Hawkins Dr Iowa City IA USA 52242 USA
Citazione:
G. Karlsson et al., "Does electrode polarity alter the energy requirements for transthoracic biphasic waveform defibrillation? Experimental studies", RESUSCITAT, 51(1), 2001, pp. 77-81

Abstract

Background: Electrode polarity may alter the success of biphasic shocks from implantable systems. Whether the electrode polarity influences the success of transthoracic biphasic defibrillation is unknown. We determined the effect of electrode polarity on biphasic transthoracic defibrillation in a porcine model. Method: In ten anesthetized adult pigs, 16-28 kg, electrode pads were placed in two different orientations on the chest wall, apex-rightparasternal and sternal-vertebral column. Ventricular fibrillation (VF) was electrically induced and allowed to persist for 30 s. Truncated exponential biphasic shocks (5/3 ms) were delivered at 20, 30, 50, 70 and 100 J. Four shocks at each energy level were delivered to construct energy vs. % success curves for VF termination. Electrode polarity for the first pulse was varied so that the first pulse cathode was either the apex (for apex-parasternal) or sternum (for sternum-vertebral column), or the reverse. The secondpulse polarity was always the opposite of the first. Results: VF termination success rose from 0 to 86% as energy increased from 20 to 100 J. Varyingthe electrode polarity did not alter success rates at any energy level with either electrode pad placement. Conclusion: In this porcine model of transthoracic defibrillation. varying the biphasic shock electrode polarity didnot alter transthoracic defibrillation success. Positional labeling of transthoracic biphasic defibrillation electrode pads may be unnecessary. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 23:21:25