Key result
Conditions with increased sympathetic activity significantly slowed the carotid-cardiac baroreflex bradycardic response compared to supine rest (2-3 s vs <1 s).
Why the study?
Does concurrent sympathetic stimulation (standing, exercise) slow the carotid-cardiac baroreflex in male subjects?
Population
6 male subjects
Comparison
10-s trains of 50-mmHg pulses of neck suction… vs Supine rest
Design
Other
Authors
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Clinicians should account for sympathetic effects in baroreflex assessment; extends physiological data but leaves clinical relevance open.
Observational (n=6)
Does concurrent sympathetic stimulation (standing, exercise) slow the carotid-cardiac baroreflex in male subjects?
The carotid-cardiac baroreflex in humans is slowed under conditions of concurrent sympathetic stimulation such as standing or exercise.
Sundblad et al. (1996) reported an observational. Conditions with increased sympathetic activity (upright rest, isometric arm exercise, dynamic leg exercise) vs. Supine rest was evaluated on Time for full bradycardic response to develop. Conditions with increased sympathetic activity significantly slowed the carotid-cardiac baroreflex bradycardic response compared to supine rest (2-3 s vs <1 s).
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