Key result
Fast idioventricular rhythm in dogs has an average rate of 92 beats/min, requires initiating beats, and is less sensitive to overdrive suppression than normal idioventricular pacemakers.
Fast idioventricular rhythm in dogs is a form of repetitive activity distinct from normal pacemaker enhancement, requiring initiating beats and showing less sensitivity to overdrive suppression.
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Animal observations in dogs leave open relevance to human post-AV block arrhythmias; prospective studies needed.
Vassalle et al. (1977) studied Fast idioventricular rhythm. Fast idioventricular rhythm vs. Normal idioventricular rhythm was evaluated on Characteristics and behavior of fast idioventricular rhythm. Fast idioventricular rhythm in dogs has an average rate of 92 beats/min, requires initiating beats, and is less sensitive to overdrive suppression than normal idioventricular pacemakers.
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