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Lookup NU author(s): Emeritus Professor Alan MurrayORCiD,
Dr Philip Langley
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This study investigated the interaction between heart rate (HR) and blood pressure (BP) during conscious control under visual biofeedback and background noise conditions. Normotensive volunteers were instructed to (i) decrease and (ii) increase HR (group A, n = 16) or BP (group B, n = 16). After instructions to lower HR or BP there was no significant change in HR or BP for either group. After instructions to raise HR, HR increased significantly (13.8 +/- 1.3 beats min(-1), P < 0.0001) and BP did not change. However, following instructions to raise BP, both HR and BP increased significantly: systolic BP (5.2 +/- 1.5 mmHg, P < 0.001), diastolic BP (3.5 +/- 0.9 mmHg, P < 0.001) and HR (8.6 +/- 1.3 beats min(-1), P < 0.0001). Biofeedback and background noise did not alter the relative change in HR or BP. In conclusion, normotensive subjects were unable to reduce BP or HR under conscious control. Subjects were able to increase both HR and BP, and voluntary increases in HR did not alter BP, while voluntary increases in BP also increased HR indicating distinct HR/BP interactions during conscious control.
Author(s): Lowdon P, Murray A, Langley P
Publication type: Article
Publication status: Published
Journal: Physiological Measurement
Print publication date: 01/03/2011
ISSN (print): 0967-3334
ISSN (electronic): 1361-6579
Publisher: Institute of Physics Publishing Ltd.
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