Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 255-259 |
| Number of pages | 5 |
| Journal | Aviation Space and Environmental Medicine |
| Volume | 71 |
| Issue number | 3 |
| Publication status | Published - 1 Mar 2000 |
Keywords
- +Gz
- Acceleration
- Adapta tion
- Baroreflex
- Cardiovascular
- Impedance cardiography
- Peripheral resistance
- Postural
- Stroke volume
- Tilt
Cite this
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The effect of baroreflex adaptation on the dynamic cardiovascular response to head-up tilt. / Newman, David G.; White, Saxon W.; Callister, Robin.
In: Aviation Space and Environmental Medicine, Vol. 71, No. 3, 01.03.2000, p. 255-259.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - The effect of baroreflex adaptation on the dynamic cardiovascular response to head-up tilt
AU - Newman, David G.
AU - White, Saxon W.
AU - Callister, Robin
PY - 2000/3/1
Y1 - 2000/3/1
N2 - 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.
AB - 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.
KW - +Gz
KW - Acceleration
KW - Adapta tion
KW - Baroreflex
KW - Cardiovascular
KW - Impedance cardiography
KW - Peripheral resistance
KW - Postural
KW - Stroke volume
KW - Tilt
UR - http://www.scopus.com/inward/record.url?scp=0034012331&partnerID=8YFLogxK
M3 - Article
VL - 71
SP - 255
EP - 259
JO - Aviation Space and Environmental Medicine
JF - Aviation Space and Environmental Medicine
SN - 0095-6562
IS - 3
ER -