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Acute changes in ambient temperature are associated with adverse changes in cardiac rhythm

机译：环境温度的急剧变化与心律的不利变化有关

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摘要

Both increases and decreases in ambient temperature have been associated with increased cardiovascular mortality and morbidity. However, the mechanism(s) remain unclear. We examined associations between biomarkers of pathways thought to, in part, explain these associations and changes in ambient temperature in a panel of predominantly postmyocardial infarction or poststent patients. We studied 76 subjects who had a recent coronary event and were participating in a cardiac rehabilitation program. In these patients, we measured heart rate variability, repolarization, and baroreflex sensitivity parameters using Holter ECG recordings before and during supervised, graded, twice-weekly, exercise sessions. Hourly temperature measurements were made at a monitoring site near the rehabilitation center. Using linear mixed models, we observed decreases in square root of the mean of the sum of the squared differences between adjacent NN intervals (rMSSD) and deceleration capacity, associated with increases in ambient temperature in the previous 4 days. Additionally, decreased rMSSD was associated with both increasing temperature (mean in previous 6 h) in the summer and decreasing temperature (mean in the previous 3 weeks) in the winter. In a panel of cardiac rehabilitation patients, changes in ambient temperature were associated with decreases in markers of heart rate variability and baroreflex sensitivity, which may lead to increased risk of arrhythmic events and sudden death in postinfarction patients.
机译：环境温度的升高和降低都与心血管疾病死亡率和发病率增加有关。但是，机制仍然不清楚。我们检查了通路的生物标志物之间的关联，这些通路在一定程度上解释了这些关联和一组主要是心肌梗死或后发性患者的环境温度的变化。我们研究了76名近期发生过冠心病并参加心脏康复计划的受试者。在这些患者中，我们在每周两次有监督的，分级的锻炼期间和期间，使用Holter ECG记录测量了心率变异性，复极和压力反射敏感性参数。在康复中心附近的监测点进行每小时温度测量。使用线性混合模型，我们观察到相邻NN间隔（rMSSD）与减速能力之间的平方差之和的平均值的平方根减小，这与前4天环境温度的升高相关。此外，rMSSD降低与夏季温度升高（前6小时的平均值）和冬季温度降低（前3周的平均值）相关。在一组心脏康复患者中，环境温度的变化与心率变异性和压力反射敏感性标志物的降低有关，这可能导致心律失常事件和梗死后患者猝死的风险增加。

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  • 来源
    《Air quality, atmosphere & health》 |2014年第3期|357-367|共11页
  • 作者

    Erin B. Wasserman; Wojciech Zareba; Mark J. Utell; David Oakes; Philip K. Hopke; Mark Frampton; David Chalupa; William Beckett; David Q. Rich;

  • 作者单位

    1.Department of Public Health Sciences University of Rochester School of Medicine and Dentistry 265 Crittenden Boulevard CU420644 Rochester NY 14642 USA;

    2.Division of Cardiology Department of Medicine University of Rochester School of Medicine and Dentistry 265 Crittenden Boulevard Rochester NY 14642 USA;

    3.Division of Pulmonary and Critical Care Medicine Department of Medicine University of Rochester School of Medicine and Dentistry 601 Elmwood Avenue Box 692 Rochester NY 14642 USA;

    4.Department of Biostatistics and Computational Biology University of Rochester School of Medicine and Dentistry 601 Elmwood Ave Box 630 Rochester NY 14642 USA;

    5.Department of Chemical and Biomolecular Engineering Clarkson University PO Box 5708 Potsdam NY 13699-5708 USA;

    3.Division of Pulmonary and Critical Care Medicine Department of Medicine University of Rochester School of Medicine and Dentistry 601 Elmwood Avenue Box 692 Rochester NY 14642 USA;

    3.Division of Pulmonary and Critical Care Medicine Department of Medicine University of Rochester School of Medicine and Dentistry 601 Elmwood Avenue Box 692 Rochester NY 14642 USA;

    6.Department of Medicine Mount Auburn Hospital 330 Mount Auburn Street Cambridge MA 02138 USA;

    1.Department of Public Health Sciences University of Rochester School of Medicine and Dentistry 265 Crittenden Boulevard CU420644 Rochester NY 14642 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ambient temperature; Cardiac rehabilitation; Heart rate variability; Repolarization;

    机译：环境温度;心脏康复;心率变异性;复极化;

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