Coming off bypass, patient with v-fib , surgeon wanted to shock with internal defib paddles, defib paddles charged , surgeon unable to deliver shock with paddles.Defibrillator machine tested in the morning (am), internal defibrillator paddles not tested during case.Shocked patient with external paddles, converted to normal sinus rhythm, no further intervention for defibrillator needed.Internal defibrillator paddles sequestered.Internal paddles sent to biomedical engineering for testing and evaluation.
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