Family Institute, The Florida State University , Tallahassee, FL , USA and.
Stress. 2014 Jan;17(1):79-87. doi: 10.3109/10253890.2013.872618.
This study investigated aortic and brachial hemodynamic functioning that may link school burnout to cardiovascular risk factors. Methodological improvements from previous research were implemented including (1) statistical control of depressive and anxiety symptoms (2) resting, stress-induced and cardiac recovery condition comparisons and (3) use of pulse wave analysis. Forty undergraduate young adult males completed self-report measures of school burnout, trait anxiety and depressive symptoms. Participants then completed a protocol consisting of a 10-min seated rest, 5-min baseline (BASE), 3-min cold pressor test (CPT) and a 3-min recovery period (REC). Indices of brachial and aortic hemodynamics were obtained by means of pulse wave analysis via applanation tonometry. Controlling for anxiety and depressive symptoms, planned contrasts identified no differences in cardiovascular parameters at BASE between participants in burnout and non-burnout groups. However, negative changes in hemodynamic indices occurred in burnout participants at CPT and REC as evidenced by increased aortic and brachial systolic and diastolic blood pressures, increased left ventricular work and increased myocardial oxygen consumption. Findings suggest that school burnout symptoms are associated with cardiac hyperactivity during conditions of cardiac stress and recovery and therefore may be associated with the early manifestations of cardiovascular disease. Future studies are suggested to reveal underlying autonomic mechanisms explaining hemodynamics functioning in individuals with school burnout symptomatology.
本研究旨在探讨主动脉和肱动脉血流动力学功能,这些功能可能与学业倦怠和心血管风险因素有关。本研究从以往研究中吸取了经验,做出了方法学上的改进,包括:(1)抑郁和焦虑症状的统计学控制;(2)静息、应激诱导和心脏恢复期的比较;(3)脉搏波分析的使用。四十名本科成年男性完成了学业倦怠、特质焦虑和抑郁症状的自我报告测量。然后,参与者完成了一个由十分钟静坐休息、五分钟基线(BASE)、三分钟冷水压迫测试(CPT)和三分钟恢复期(REC)组成的方案。肱动脉和主动脉血流动力学指数通过平板压力测量法的脉搏波分析获得。在控制焦虑和抑郁症状的情况下,计划对比发现,倦怠组和非倦怠组在 BASE 时的心血管参数没有差异。然而,在 CPT 和 REC 时,倦怠组的血流动力学指数发生了负向变化,表现为主动脉和肱动脉收缩压和舒张压升高、左心室做功增加和心肌耗氧量增加。研究结果表明,学业倦怠症状与心脏应激和恢复期的心脏过度活动有关,因此可能与心血管疾病的早期表现有关。建议未来的研究揭示解释具有学业倦怠症状个体的血流动力学功能的潜在自主机制。