作者: Arjen Mol , Carel G.M. Meskers , Sjoerd P. Niehof , Andrea B. Maier , Richard J.A. van Wezel
DOI: 10.1016/J.EXGER.2020.110938
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摘要: Abstract Objectives Changes of vasoconstriction may be measured non-invasively using pulse transit time. This study assessed the sensitivity, test-retest reliability and validity time during provocation active standing, predictive value for blood pressure drop. Methods Fifty-five younger (age 70 years) underwent electrocardiography, wrist finger photoplethysmography continuous total peripheral resistance measurements a cold pressor test (21 adults), or stand tests (all other participants). Pulse was defined as lag between electrocardiography R-peak peak in first derivative; sensitivity significant decrease relative to baseline; intra class correlation different repeats same test; association time; supine resting mean arterial drop standing. Results Finger sensitive reliable (ICC 0.2–0.8) provocation, but poorly 0–0.5); only 0.4–0.8) standing both older adults. not associated with resistance. Supine had adults (β −0.16; p 0.025). Conclusions did significantly differ could demonstrated particularly reflect vasoconstriction, it