Relation between coronary sinus plasma potassium and cardiac arrhythmia.

IT APPEARS to be rather widely accepted that ventricular fibrillation very often follows premature ventricular beats occurring singly, or more often in a rapid series. The premature beat is most likely to lead to fibrillation if it occurs during repolarization of the ventricle (vulnerable period)." The extra systoles resulting from coronary occlusion can well be the cause of the ventricular fibrillation which often results in the fatal termination of this condition.