Effect of passive heat stress on arterial stiffness in smokers versus non-smokers

被引:14
作者
Moyen, N. E. [1 ]
Ganio, M. S. [1 ]
Burchfield, J. M. [1 ]
Tucker, M. A. [1 ]
Gonzalez, M. A. [1 ]
Dougherty, E. K. [1 ]
Robinson, F. B. [1 ]
Ridings, C. B. [1 ]
Veilleux, J. C. [2 ]
机构
[1] Univ Arkansas, Human Performance Lab, Dept Hlth Human Performance & Recreat, Fayetteville, AR 72701 USA
[2] Univ Arkansas, Dept Psychol Sci, Fayetteville, AR 72701 USA
关键词
Arterial compliance; Core temperature; Heating; Pulse wave velocity; Shear stress; Smoking; SYMPATHETIC-NERVE ACTIVITY; CIGARETTE-SMOKING; NITRIC-OXIDE; HABITUAL EXERCISE; SHEAR-STRESS; YOUNG MEN; IN-VIVO; HUMANS; ELASTICITY; BODY;
D O I
10.1007/s00484-015-1046-2
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
In non-smokers, passive heat stress increases shear stress and vasodilation, decreasing arterial stiffness. Smokers, who reportedly have arterial dysfunction, may have similar improvements in arterial stiffness with passive heat stress. Therefore, we examined the effects of an acute bout of whole-body passive heat stress on arterial stiffness in smokers vs. non-smokers. Thirteen smokers (8.8 +/- 5.5 [median = 6] cigarettes per day for > 4 years) and 13 non-smokers matched for age, mass, height, and exercise habits (27 +/- 8 years; 78.8 +/- 15.4 kg; 177.6 +/- 6.7 cm) were passively heated to 1.5 A degrees C core temperature (T (C)) increase. At baseline and each 0.5 A degrees C T (C) increase, peripheral (pPWV) and central pulse wave velocity (cPWV) were measured via Doppler ultrasound. No differences existed between smokers and non-smokers for any variables (all p > 0.05), except cPWV slightly increased from baseline (526.7 A +/- 81.7 cm A center dot s(-1)) to 1.5 A degrees C Delta T (C) (579.7 A +/- 69.8 cm A center dot s(-1); p < 0.005), suggesting heat stress acutely increased central arterial stiffness. pPWV did not change with heating (grand mean: baseline = 691.9 A +/- 92.9 cm A center dot s(-1); 1.5 A degrees C Delta T (C) = 691.9 A +/- 79.5 cm A center dot s(-1); p > 0.05). Changes in cPWV and pPWV during heating correlated (p < 0.05) with baseline PWV in smokers (cPWV: r = -0.59; pPWV: r = -0.62) and non-smokers (cPWV: r = -0.45; pPWV: r = -0.77). Independent of smoking status, baseline stiffness appears to mediate the magnitude of heating-induced changes in arterial stiffness.
引用
收藏
页码:499 / 506
页数:8
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