The effect of baroreflex adaptation on the dynamic cardiovascualr response to head-up tilt

Title: The effect of baroreflex adaptation on the dynamic cardiovascualr response to head-up tilt
Creator: Newman, David G.; White, Saxon William; Callister, Robin
Relation: Aviation, Space, and Environmental Medicine Vol. 71, Issue 3, p. 255-259
Relation: http://www.asma.org/publications/asem-journal/read-the-journal
Publisher: Aerospace Medical Association
Resource Type: journal article
Date: 2000
Description: Background: Baroreflex adaptation to repetitive +Gz has been reported previously. The underlying mechanism may involve different responses of stroke volume (SV) and total peripheral resistance (TPR) to +Gz. Hypothesis: The previously observed enhanced mean arterial pressure (MAP) regulation in fighter pilots (FP) is mediated by increases in SV and/or TPR. Methods: There were 8 pilots and 12 non-pilots who underwent head-up tilt. SV was determined using impedance cardiography. Results: MAP increased significantly in FP, due to heart rate (HR) and TPR increasing more and SV decreasing less. Conclusion: Baroreflex adaptation results in better performance of HR, SV and TPR in response to +Gz.
Subject: stroke volume; peripheral resistance; impedance cardiography; +Gz; tilt; postural; acceleration; baroreflex; cardiovascular; adaptation
Identifier: http://hdl.handle.net/1959.13/936028
Identifier: uon:12190
Identifier: ISSN:0095-6562
Language: eng
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