Hemodynamic and metabolic changes prior to speech performance
Hemodynamic and metabolic changes prior to speech performance
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演讲前的血流动力学和代谢变化
DOI：
10.3758/bf03327013
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
S. Horvath
中科院分区：
文献类型：
--
作者：
J. Gliner;D. Bunnell;S. Horvath
心血管和代谢反应，记录了12名受试者之前立即口头介绍，并在对照期间，当其他人给这个介绍。测量心输出量、血压、耗氧量和其他血液动力学和代谢反应，以确定焦虑期间的心血管反应是否夸大了情况的代谢需求。虽然受试者之间存在广泛的个体差异，但出现了明确的关系。焦虑期间心输出量的变化与动-静脉差异的变化之间存在显著的负相关性，这表明心血管代谢分离是焦虑的一个功能。此外，焦虑期间心输出量的变化与总外周阻力的变化之间存在显著的负相关性，这表明肾上腺素的增加可能介导了心血管变化。由于表现前焦虑，没有一个代表性的血流动力学模式，表明在试图表征对心理应激的心血管代谢反应时，有必要评估受试者的总体血流动力学反应模式。
Cardiovascular and metabolic responses were recorded from 12 subjects immediately prior to an oral presentation and during a control period when others were giving this presentation. Cardiac output, blood pressure, oxygen consumption, and other hemodynamic and metabolic responses were measured in order to determine whether the cardiovascular responses during anxiety were in exaggeration of the metabolic demands of the situation. Although there were wide individual differences among subjects, definite relationships emerged. A significant negative correlation between change in cardiac output and change in arterial-venous difference during anxiety demonstrated that a cardiovascular-metabolic dissociation had taken place as a function of anxiety. Furthermore, a significant negative correlation between change in cardiac output and change in total peripheral resistance during anxiety suggested that increased epinephrine was probably mediating the cardiovascular change. There was no one representative hemodynamic pattern due to the preperformance anxiety, indicating the necessity of assessing overall hemodynamic response patterning in subjects when attempting to characterize cardiovascular-metabolic responses to psychological stress.