Key result
An amplitude spectrum area (AMSA) value of 21 mV x Hz predicted the failure of a shock to reestablish spontaneous circulation with a 96% negative predictive value in a porcine model.
Why the study?
Does amplitude spectrum area (AMSA) predict the success of defibrillation in a porcine model of ventricular fibrillation?
Population
Porcine model of cardiac arrest because of ventricular fibrillation
Comparison
Electrocardiographic waveform analysis using… vs Coronary perfusion pressure
Design
Preclinical
Authors
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AMSA may guide defibrillation timing in VF; hypothesis-generating in porcine models and requires human validation.
Does amplitude spectrum area (AMSA) predict the success of defibrillation in a porcine model of ventricular fibrillation?
Effect estimate: NPV 96%
Amplitude spectrum area (AMSA) is a promising electrocardiographic predictor that may guide optimal timing of defibrillation by accurately predicting the failure of shocks to restore spontaneous circulation.
Póvoas et al. (2000) studied Cardiac arrest due to ventricular fibrillation. Amplitude spectrum area (AMSA) vs. Coronary perfusion pressure was evaluated on Restoration of perfusing rhythm (NPV 96%). An amplitude spectrum area (AMSA) value of 21 mV x Hz predicted the failure of a shock to reestablish spontaneous circulation with a 96% negative predictive value in a porcine model.
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