Key result
Controlled breathing at higher rates (up to 16 breaths/min) decreased respiratory-related RR and systolic blood pressure oscillations, independent of sympathetic drive.
Why the study?
Does respiratory rate affect the relationship between RR interval and systolic blood pressure fluctuations in healthy volunteers?
Population
14 healthy volunteers
Comparison
Controlled breathing at 6, 10, and 16 breaths/min vs Different breathing frequencies compared to each…
Design
Other, randomized periods of controlled breathing
Authors
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Respiratory rate should be standardized during autonomic assessments; hypothesis-generating for baroreflex mechanisms independent of sympathetic drive.
RCT (n=14)
randomized periods
Does respiratory rate affect the relationship between RR interval and systolic blood pressure fluctuations in healthy volunteers?
The relationship between heart rate and systolic blood pressure variability is dependent on respiratory frequency, an effect that is independent of sympathetic drive.
Maria Vittoria Pitzalis (1998) conducted an RCT in Healthy (n=14). Controlled breathing at different frequencies vs. Within-subject comparison across frequencies was evaluated on Relationships between oscillations in systolic blood pressure and heart period (RR) at different breathing frequencies. Controlled breathing at higher rates (up to 16 breaths/min) decreased respiratory-related RR and systolic blood pressure oscillations, independent of sympathetic drive.
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