Key result
Premature atrial stimulation in rabbit sinoatrial preparations showed progressive prolongation of return cycles associated with depressed atriosinus conduction and sinus node automaticity.
Population
Sinoatrial preparations of rabbit hearts
Design
Preclinical
Authors
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Provides foundational sinoatrial insights from rabbits; leaves open human translation and clinical relevance of reentry.
This experimental study elucidates the electrophysiological mechanisms underlying clinically observed sinoatrial responses to premature atrial stimulation, including potential sinus node reentry.
Matsuo et al. (1980) studied Sinoatrial responses to premature atrial stimulation. Premature atrial stimulation was evaluated on Return cycles and sinoatrial responses. Premature atrial stimulation in rabbit sinoatrial preparations showed progressive prolongation of return cycles associated with depressed atriosinus conduction and sinus node automaticity.
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