Medical Memoranda MEDICURNAL 1523 attacks, occurring between 8.30 and 9 a.m., were noted to follow runs of coupled ectopic beats, and recurrent ventricular fibrillation was shown by E.C.G. (Fig. 1). Each attack either terminated spontaneously or was terminated by external cardiac massage, but the basic dysrhythmia of coupled ventricular ectopic beats persisted.
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