The current study examined whether the exposure to life events and reported impact of life events are associated with altered cardiac reactivity to an acute psychological stressor. Participants (N = 69) completed the Life Experience Survey (LES) and Positive and Negative Affect Schedule (PANAS) and undertook a standardized social-evaluative stress task. Cardiac activity was measured via heart rate and non-linear heart rate variability (HRV) indices Sample Entropy, SD1, SD2 and SD1/SD2 ratio. Heart rate and non-linear HRV were measured before, during and after stress exposure. Findings suggest higher heart rate reactivity in individuals reporting higher number and impact of negative and total life events. Decreases in Sample Entropy were evident for number as well as impact of life events. No associations were found for SD1, SD2 and SD1/SD2 ratio. Findings suggest that life-events are associated with elevated heart rate and diminished heart rate complexity in response to acute stress.

目前的研究检查了生活事件的暴露和生活事件的报告影响是否与心脏对急性心理压力源的反应性改变有关。参与者 (N = 69) 完成了生活体验调查 (LES) 和正面和负面影响表 (PANAS)，并进行了标准化的社会评估压力任务。通过心率和非线性心率变异性 (HRV) 指数样本熵、SD1、SD2 和 SD1/SD2 比率测量心脏活动。在压力暴露之前、期间和之后测量心率和非线性 HRV。研究结果表明，报告负面和总体生活事件数量和影响较高的个体的心率反应性较高。样本熵的减少在生活事件的数量和影响方面都很明显。未发现 SD1、SD2 和 SD1/SD2 比率存在关联。