Cardiac vagal control in response to acute stress during pregnancy: Associations with life stress and emotional support.
Cardiac vagal control in response to acute stress during pregnancy: Associations with life stress and emotional support.
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DOI：
10.1111/psyp.13808
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发表时间：
2021-06
期刊：
影响因子：
3.7
通讯作者：
Hipwell AE
中科院分区：
文献类型：
--
作者：
Tung I;Krafty RT;Delcourt ML;Melhem NM;Jennings JR;Keenan K;Hipwell AE
怀孕期间的生活压力会扰乱母亲的压力调节并对后代的健康产生负面影响。尽管心脏迷走神经控制（例如心率变异性；HRV）在压力调节中发挥着重要作用，但很少有研究调查生活压力源和情绪支持如何影响怀孕期间的迷走神经控制。本研究的目的是（1）描述心脏迷走神经控制对怀孕期间应激源的反应模式，以及（2）检查生活压力和情绪支持对休息、反应和恢复期间迷走神经控制的影响。参与者包括 191 名居住在美国城市的孕妇（79% 是黑人；21% 是白人）（73% 接受公共援助）。在特里尔社会压力任务 (TSST) 的准备、任务和恢复期间持续记录心率 (HR) 和 HRV（以 RMSSD 为索引）。参与者报告了最近的生活压力（例如，人际关系问题、经济困难）和情感支持。分段生长曲线模型用于模拟反应率和恢复率，并根据评估时的胎龄和最近的健康问题进行调整。生活压力预示着 TSST 的 HR 和 HRV 反应性更大，HRV 恢复（迷走神经回弹）也更大。然而，这种关联仅在报告高情感支持的女性中才明显。结果表明，经常承受生活压力的孕妇可能会对急性压力表现出更快速的自主反应，包括压力后迷走神经更快地反弹，这可能反映了对预期高压力环境的生理适应；情感支持可能会增强这些反应。需要进行研究来调查与这种压力反应模式相关的长期健康结果。
Life stressors during pregnancy can disrupt maternal stress regulation and negatively impact offspring health. Despite the important role of cardiac vagal control (e.g., heart rate variability; HRV) in stress regulation, few studies have investigated how life stressors and emotional support influence vagal control during pregnancy. This study aimed to (1) characterize patterns of cardiac vagal control in response to a stressor administered in pregnancy, and (2) examine the effects of life stress and emotional support on vagal control during rest, reactivity, and recovery. Participants included 191 pregnant women (79% Black; 21% White) living in an urban U.S. city (73% receiving public assistance). Heart rate (HR) and HRV (indexed by RMSSD) were recorded continually during the preparation, task, and recovery periods of the Trier Social Stress Task (TSST). Participants reported recent life stressors (e.g., relationship problems, financial hardship) and emotional support. Piecewise growth curve modelling was used to model rates of reactivity and recovery, adjusting for gestational age at time of assessment and recent health problems. Life stress predicted greater HR and HRV reactivity to the TSST as well as greater HRV recovery (vagal rebound). However, associations were only evident for women reporting high emotional support. Results suggest that pregnant women living with frequent life stressors may exhibit more rapid autonomic responses to acute stress, including more rapid vagal rebound after stressors, potentially reflecting physiological adaptation to anticipated high-stress environments; emotional support may enhance these responses. Studies are needed to investigate long-term health outcomes related to this stress response pattern.
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