Efficacy of distinct energy delivery protocols comparing two biphasic defibrillators for cardiac arrest.
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.
Regional Medical Cardiology Centre, Royal Victoria Hospital, Grosvenor Road, Belfast, Northern Ireland.
Simon J
SJ
Walsh
Anthony J J
AJ
McClelland
Colum G
CG
Owens
James
J
Allen
John McC
JM
Anderson
Colin
C
Turner
A A Jennifer
AA
Adgey
D000368:Aged; D000369:Aged, 80 and over; D016887:Cardiopulmonary Resuscitation / Q000379:methods; D015331:Cohort Studies; D004554:Electric Countershock / Q000295:instrumentation*; D017097:Electric Impedance; D004867:Equipment Design; D004869:Equipment Safety; D005260:Female; D006323:Heart Arrest / Q000401:mortality / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011336:Probability; D016019:Survival Analysis; D016896:Treatment Outcome; D014693:Ventricular Fibrillation / Q000401:mortality / Q000628:therapy*