Key result
Simultaneous activation of sympathetic and parasympathetic nerves nonuniformly shortens the effective refractory period in the right atrium as the algebraic sum of individual responses.
Population
Anesthetized dogs
Comparison
Autonomic nerve stimulation vs Individual nerve stimulation or baseline
Design
Preclinical
Authors
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May guide autonomic neuromodulation research in atrial electrophysiology; leaves open translation to human arrhythmia management.
Simultaneous sympathetic and parasympathetic stimulation additively shortens the atrial effective refractory period, with parasympathetic tone being the dominant regulator.
Takei et al. (1991) studied this question. Autonomic nerve stimulation (sympathetic and parasympathetic) was evaluated on Effective refractory period (ERP) of the right atrium. Simultaneous activation of sympathetic and parasympathetic nerves nonuniformly shortens the effective refractory period in the right atrium as the algebraic sum of individual responses.
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