a Department of Health Sciences, Faculty of Science , University of York , York , UK.
b Department of Psychology, Faculty of Health and Life Sciences , Northumbria University , Newcastle upon Tyne , UK.
Stress. 2019 Jul;22(4):428-435. doi: 10.1080/10253890.2019.1583741. Epub 2019 Mar 11.
Type D personality is characterized by increased social inhibition and negative affectivity. Research demonstrates associations between Type D and poor physical health. Maladaptive sympathetic arousal is suggested as a potential mechanism, however, findings are inconsistent and studies mainly focus on basic cardiovascular parameters. The current study examines cardiovascular and haemodynamic parameters in addition to salivary alpha amylase (sAA) as markers of sympathetic stress reactivity in Type D individuals. Healthy adults (N = 75; 33 Type D; aged 18-42; 64% female) completed a multitasking stressor while continuous beat-to-beat cardiovascular function was measured. Saliva samples were obtained at baseline, pre-task, post-task, +10 min and +20 min post-task. Type Ds exhibited dysfunctional cardiovascular reactivity, characterized by blunted total peripheral resistance, slower stroke volume recovery and potentially unhealthy changes in haemodynamic profile. Alpha amylase reactivity was evident, but group differences were not significant. Findings indicate dysregulated sympathetic reactivity in Type D individuals, exemplified by a maladaptive haemodynamic profile.
D 型人格的特征是社交抑制和负性情感增加。研究表明 D 型人格与身体健康状况不佳有关。适应性交感神经兴奋被认为是潜在的机制，但研究结果不一致，且主要集中在基本心血管参数上。本研究除了唾液α-淀粉酶 (sAA) 作为交感神经应激反应的标志物外，还检测了 D 型个体的心血管和血液动力学参数。健康成年人（N=75；33 名 D 型；年龄 18-42 岁；64%为女性）在完成一项多任务应激源的同时，连续测量了心率变异性。在基线、任务前、任务后、任务后 10 分钟和任务后 20 分钟采集唾液样本。D 型个体表现出功能失调的心血管反应性，表现为总外周阻力降低、每搏量恢复缓慢以及血液动力学特征可能不健康的变化。α-淀粉酶反应明显，但组间差异无统计学意义。研究结果表明 D 型个体存在交感神经反应失调，表现为血液动力学特征失调。
