Key result
Higher energy electrical defibrillation (20-J vs 2-J) increased the severity of postresuscitation myocardial dysfunction and reduced survival time (5±3 hours vs >24 hours) in a rat model.
Why the study?
Does higher energy electrical defibrillation increase the severity of postresuscitation myocardial dysfunction in a rat model of ventricular fibrillation?
Population
15 Sprague-Dawley rats with induced ventricular fibrillation
Comparison
External defibrillation with a single stored… vs External defibrillation with a single stored 2-J…
Design
Preclinical
Follow-up
>24 hours
Authors
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Should not alter defibrillation protocols; hypothesis-generating for energy optimization in resuscitation research.
Does higher energy electrical defibrillation increase the severity of postresuscitation myocardial dysfunction in a rat model of ventricular fibrillation?
Higher energy defibrillation shocks are associated with more severe postresuscitation myocardial dysfunction and reduced survival in a rat model of cardiac arrest.
Xie et al. (1997) studied Ventricular fibrillation and cardiac arrest (n=15). External defibrillation vs. Different energy levels (2-J vs 10-J vs 20-J) was evaluated on Myocardial function (cardiac index, dP/dt40, negative dP/dt, left ventricular diastolic pressure) and survival time. Higher energy electrical defibrillation (20-J vs 2-J) increased the severity of postresuscitation myocardial dysfunction and reduced survival time (5±3 hours vs >24 hours) in a rat model.
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