Stress responses and baroreflex function in coronary disease.
Stress responses and baroreflex function in coronary disease.
复制标题
冠状动脉疾病中的应激反应和压力感受反射功能。
DOI:
10.1152/japplphysiol.91053.2008
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Taylor,JAndrew
中科院分区:
文献类型:
--
作者:
Deley,Gaelle;Lipman,RuthD;Kannam,JosephP;Bartolini,Claudia;Taylor,JAndrew
Exaggerated pressor responses to mental stress in patients with coronary artery disease (CAD) are associated with increased risk for subsequent cardiovascular events. The integrated baroreflex gain and its mechanical and neural component were estimated and then related to the blood pressure and heart rate responses to simulated real-life stressors: mental arithmetic and public speaking. Eighteen healthy individuals (aged 61 ± 8 yr) and 29 individuals with documented CAD but no other comorbidities (aged 59 ± 8 yr) were studied. Heart rate and blood pressures were continuously assessed before, during preparation for, and during performance of a math task and a speech task. The assessment of beat-to-beat carotid diameters during baroreflex engagement was used to estimate the integrated baroreflex gain and its mechanical and neural component. The CAD subjects demonstrated significantly greater increases in heart rate and blood pressures for the performance of the speech task. However, there were no group differences in integrated cardiovagal baroreflex gain or either mechanical or neural baroreflex component. These findings indicate that the augmented pressor responses in CAD do not result from a generalized arterial baroreflex deficit.
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