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Am J Cardiol. 2004 Aug 1;94(3):378-80.

Efficacy of distinct energy delivery protocols comparing two biphasic defibrillators for cardiac arrest.

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Regional Medical Cardiology Centre, Royal Victoria Hospital, Grosvenor Road, Belfast, Northern Ireland.


Limited data have been published on the use of external defibrillators that deliver impedance compensated biphasic (ICB) waveforms in patients. We compared 2 ICB defibrillators, the Heartstream XL (150-150-150 J protocol) and Heartsine Samaritan (100-150-200 J protocol) in 78 consecutive patients in cardiac arrest. The performance of the 2 devices over the first 2 shocks was statistically equivalent. By the third shock, the Heartsine Samaritan had significantly better performance in removing ventricular fibrillation (p = 0.029). Energy selection for ICB waveforms requires further validation.

[Indexed for MEDLINE]

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