Key result
Combined parasympathetic and sympathetic stimulation in dogs showed a substantial interaction, where the sympathetically mediated inotropic effect became less pronounced as vagal stimulation increased.
Why the study?
How does combined parasympathetic and sympathetic stimulation affect right atrial contractile strength in dogs?
Population
10 open-chest, pentobarbital-anesthetized dogs
Comparison
Combined parasympathetic and sympathetic… vs Varying frequencies of stimulation
Design
Preclinical
Authors
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Vagal-sympathetic interactions on canine atrial contractility are hypothesis-generating; leaves open human translation and therapeutic relevance.
How does combined parasympathetic and sympathetic stimulation affect right atrial contractile strength in dogs?
Vagal stimulation attenuates the sympathetically mediated inotropic effect on right atrial contractile strength in a canine model.
Stuesse et al. (1979) studied this question. Parasympathetic and sympathetic stimulation was evaluated on Percent changes in atrial contractile strength. Combined parasympathetic and sympathetic stimulation in dogs showed a substantial interaction, where the sympathetically mediated inotropic effect became less pronounced as vagal stimulation increased.
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