radial pressure pulse and heart rate variability in heat- and cold-stressed humans
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2011
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Abstract
This study aims to explore the effects of heat and cold stress on the radial pressure pulse (RPP) and heart rate variability (HRV). The subjects immersed their left hand into 45°C and 7°C water for 2 minutes. Sixty healthy subjects (age 25±4 yr; 29 men and 31 women) were enrolled in this study. All subjects underwent the supine temperature measurements of the bilateral forearms, brachial arterial blood pressure, HRV and RPP with a pulse analyzer in normothermic conditions, and thermal stresses. The power spectral low-frequency (LF) and high-frequency (HF) components of HRV decreased in the heat test and increased in the cold test. The heat stress significantly reduced radial augmentation index (AIr) (P<.05), but the cold stress significantly increased AIr (P<.01). The spectral energy of RPP did not show any statistical difference in 0∼10 Hz region under both conditions, but in the region of 10∼50 Hz, there was a significant increase (P<.01) in the heat test and a significant decrease in the cold test (P<.01). The changes in AIr induced by heat and cold stress were significantly negatively correlated with the spectral energy in the region of 10∼50 Hz (SE10−50 Hz) but not in the region of 0∼10 Hz (SE0−10 Hz). The results demonstrated that the SE10−50 Hz, which only possessed a small percentage in total pulse energy, presented more physiological characteristics than the SE0−10 Hz under the thermal stresses.
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| Reference Key |
huang2011evidence-basedradial
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|---|---|
| Authors | ;Chin-Ming Huang;Hsien-Cheh Chang;Shung-Te Kao;Tsai-Chung Li;Ching-Chuan Wei;Chiachung Chen;Yin-Tzu Liao;Fun-Jou Chen |
| Journal | ACS applied materials & interfaces |
| Year | 2011 |
| DOI |
10.1155/2011/751317
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| URL | |
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