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. 2023 Feb 6:17:1121902.
doi: 10.3389/fnins.2023.1121902. eCollection 2023.

Variation of peripheral pulse transit time with internal vascular pressure changes induced by arm movement

Zhiwei Sun  1 , Xinge Jiang  1 , Hua Wu  1 , Feifei Liu  2
Affiliations

Variation of peripheral pulse transit time with internal vascular pressure changes induced by arm movement

Zhiwei Sun et al. Front Neurosci. .

Abstract

Pulse transit time (PTT) and blood pressure (BP) are widely used to quantify arterial characteristics. Arm position influences arterial BP and peripheral PTT. This study aims to quantify the relationship between PTT changes with internal vascular pressure variations induced by the arm moving. With left arm at horizontal position as reference and the right arm moving from 90 to 45, 0, -45, and -90° respectively, PTT difference was calculated by the difference of the pulse foot between right arm and left arm within the same heartbeat. The change in the BP was calculated from the gravitational effect with the measured arm length. Our results showed that the change in PTT with arm elevating is more obvious than that with arm lowering, indicating the different relationship between PTT changes due to the internal BP changes. This can help in understanding the inherent physiological/pathological mechanism of cardiovascular system.

Keywords: arm position; arterial blood pressure; arterial properties; hydrostatic principle; pulse transit time.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
An example of calculating the PTT difference with the left arm at the horizontal position as a reference and the right arm at 90°.
Figure 2
Figure 2
Means and standard deviations (SDs) of mean arterial pressure (MAP) and pulse transit time (PTT) differences with the right arm at different positions. (A) Means and SDs of MBP with the right arm at five positions to the horizontal level and (B) means and SDs of PTT differences with the right arm at five positions to the horizontal level.
Figure 3
Figure 3
Relationship between each subject's changes in the pulse transit time (PTT) and corresponding mean arterial pressure (MAP) with the arm at 90, 45, −45, and −90o, respectively.
See this image and copyright information in PMC

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