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Hemodynamic responses to passive body tilts

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Author(s)
E.U. ChaeY.S. Suh
Keimyung Author(s)
Suh, Young SungChae, E Up
Department
Dept. of Family Medicine (가정의학)
Dept. of Physiology (생리학)
Journal Title
Physiologist
Issued Date
1993
Volume
36
Issue
S1
Abstract
To investigate the relationship between the effects of gravity and hemodynamic responses to body tilts in the early steady-state, twelve healthy young adult males were passively tilted from the supine control position (SCP) to the 15 degrees, 30 degrees and 60 degrees head-up position (HU), and then the -15 degrees and -30 degrees head-down position (HD). Cardiac output (Q), stroke volume (SV), acceleration index (ACI) of the heart, thoracic fluid volume (TFV), blood pressure (BP), heart rate (HR), total peripheral vascular resistance (TPR) and ECG were measured. In the postural changes from SCP to the 15 degrees, 30 degrees and 60 degrees HU, the SV gradually decreased and the Q also decreased. The HR and TPR gradually increased. On the contrary, in the -15 degrees and -30 degrees HD, the SV increased and the Q increased and the HR and TPR decreased. The ACI increased in the HD, but decreased in the HU. The mean BP increased in the HU, but decreased in the HD. The TFV increased in the HD, and decreased in the HU. The average QRS vector was 56.1 degrees on the SCP and it increased in the HU, but decreased in the HD. In conclusion, the changes of hemodynamic parameters except in BP were linearly related to the sine of the tilt angle in regardless of HU or HD.
Keimyung Author(s)(Kor)
서영성
채의업
Publisher
School of Medicine
Citation
E.U. Chae and Y.S. Suh. (1993). Hemodynamic responses to passive body tilts. Physiologist, 36(S1), S20–S21.
Type
Article
ISSN
0031-9376
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/34644
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Family Medicine (가정의학)
1. School of Medicine (의과대학) > Dept. of Physiology (생리학)
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