Apr 25, 2007

The relationship between shocks and survival in out-of-hospital cardiac arrest patients initially found in PEA or asystole

A HallstromJames Christenson


To describe survival rates from out-of-hospital cardiac arrest for patients who present with pulseless electrical activity or asystole according to whether they remained in a non-shockable rhythm or converted to ventricular fibrillation and were shocked appropriately. Observational analysis of a cardiac arrest registry collected as part of a randomized trial. Five urban/suburban cities in the United States and Canada. Trial subjects (adult, treated, non-traumatic) whose first documented heart rhythm/state following cardiac arrest was asystole or pulseless electrical activity. Periodic pauses to assess for shockable rhythm. Survival to hospital discharge. Of 1377 cardiac arrest patients, 738 presented with an initial arrest rhythm/state of either pulseless electrical activity or asystole. Of the 738, 78% (n=574) subsequently remained in a non-shockable rhythm/state at each evaluation throughout the resuscitation (No-Shock group) while 22% (n=164) converted to ventricular fibrillation and were shocked by emergency medical service (Shock group). Survival to hospital discharge was significantly greater in the No-Shock group (4.9% versus 0.6%, p=0.01). Shock group remained a predictor (odds ratios=0.18, p=0.036) of death after adjus...Continue Reading

Mentioned in this Paper

Ventricular Fibrillation
Basic Cardiac Life Support
Cardiac Rhythm Type
Observation - Diagnostic Procedure
Electroversion Therapy
Electrocardiographic Recorders
Electromechanical Dissociation
Pulse Rate

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