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首页> 外文期刊>Occupational and environmental medicine >Circadian variation of heart rate variability among welders.
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Circadian variation of heart rate variability among welders.

机译：焊工心率变异性的昼夜变化。

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OBJECTIVE: To compare the circadian variation of hourly heart rate variability (HRV) on work and non-workdays among boilermaker construction workers. METHOD: A panel study of 18 males monitored by 24-h ambulatory ECG over 44 observation-days on paired work and non-workdays was conducted. ECGs were analysed and the SD of normal-to-normal beats index (SDNN(i)) was calculated from 5-min data and summarised hourly. SDNN(i)s over work and non-workdays were compared using linear mixed-effects models to account for repeated measures and harmonic regression to account for circadian variation. RESULTS: Both work and non-work hourly HRV exhibited circadian variation with an increase in the evening and a decrease in the afternoon. SDNN(i) was lower on workdays as compared with non-workdays with the largest, statistically significant differences observed between 10:00 and 16:00, during active working. Lower SDNN(i), albeit smaller yet statistically significant differences, was also observed in the evening hours following work (17:00-21:00) and early morning (4:00). In regression models using all time periods, an average workday SDNN(i) was 8.1 ms (95% CI -9.8 to -6.3) lower than non-workday SDNN(i). The circadian pattern of HRV exhibited two peaks which differed on work and non-workdays. CONCLUSION: While workday and non-workday HRV followed a circadian pattern, decreased HRV and variation of the circadian pattern were observed on workdays. Declines and changes in the circadian pattern of HRV is a concern among this exposed population.
机译：目的：比较锅炉制造商建筑工人在工作日和非工作日的每小时心率变异性（HRV）的昼夜变化。方法：在配对工作日和非工作日的44个观察日内，对24例动态心电图监测的18名男性进行了小组研究。分析心电图，并从5分钟数据计算正常搏动指数SDN（i）的SD，并每小时进行汇总。使用线性混合效应模型比较工作和非工作日的SDNN（i），以考虑重复测量，并使用谐波回归来解决昼夜节律变化。结果：每小时和非工作小时HRV均显示昼夜节律变化，晚上增加，下午减少。在正常工作期间，SDNN（i）在工作日的工作量要低于非工作日，在10:00和16:00之间观察到的差异具有最大的统计学意义。较低的SDNN（i），尽管差异较小，但差异有统计学意义，但在下班后的晚上（17：00-21：00）和清晨（4:00）也观察到了。在使用所有时间段的回归模型中，平均工作日SDNN（i）比非工作日SDNN（i）低8.1毫秒（95％CI -9.8至-6.3）。 HRV的昼夜节律模式显示两个高峰，在工作日和非工作日均不同。结论：当工作日和非工作日HRV遵循昼夜节律模式时，在工作日观察到HRV降低和昼夜节律模式变化。在这些暴露人群中，HRV昼夜节律模式的下降和变化是一个问题。

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