A Washington University meta-analysis in The Lancet pooled three studies of more than 3,700 cardiac arrest patients and found survival improved by 22 percent when 911 dispatchers told bystanders to give chest compressions only rather than conventional CPR.
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Immediate chest compressions better cardiac arrest outcomes
Pooling four randomized trials with 1,503 patients, researchers reported in BMC Medicine that starting with chest compressions matched immediate defibrillation on return of circulation and survival to discharge, while compression-first patients fared better at one year, 11 against 6 percent.
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Compression-only cardiopulmonary resuscitation beats standard CPR
Two New England Journal of Medicine studies found chest compressions alone at least matched standard CPR: 12.5 against 11 percent surviving to discharge in one, 8.7 against 7 percent alive at 30 days in the other. A 2007 Lancet study suggested rescue breathing may raise brain damage.
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