舰员长航期间心率变异性研究

Analysis of heart rate variability in warship crew during long-term navigation

目的探讨舰员长航期间心率变异性的变化。方法对57名舰员进行24 h动态心电图监测,比较航行前5~15 d、航行70~80 d、返航后5~15 d的心率变异性。结果舰员航行70~80 d时,心率变异性各时域指标(24 h内全部正常心动周期的标准差、24 h内每5 min心动周期均值的标准差、全程两个相邻的正常心动周期差值的均方根值、相邻两个正常心动周期差值>50 ms的心搏数占全程心搏数的百分率)与三角指数均明显低于航行前5~15 d与返航后5~15 d,差异均有统计学意义(P<0.05);返航后5~15 d时,上述指标与航行前5~15 d比较,差异无统计学意义(P>0.05)。航行70~80 d时,机电部门舰员心率变异性各时域指标与三角指数均明显低于非机电部门舰员,轮值舰员心率变异性各时域指标与三角指数均明显低于非轮值舰员,差异均有统计学意义(P<0.05)。结论长航会损伤舰员的自主神经功能,使心率变异性降低,但这种损伤是部分可逆的,返航后可基本恢复至航行前水平。

Objective To investigate the changes of heart rate variability （HRV） in warship crew during long-term navigation. Meth- ods Fifty-seven warship crew received Holter monitoring in different periods of the long-term navigation,in the first period（5-15 clays before voyage） ,the second period（70 - 80 clays in voyage） and the third period（5-15 days after voyage）. HRV was analyzed accord- ing to the results of I-loiter monitoring. Results Every time domain index of heart rate variability （ all normal cardiac cycle of the standard deviation within 24 hours ,24 hours per 5 minute-time standard deviation from the mean value of the cardiac cycle, the two ad- jacent normal difference of mean square root value of the cardiac cycle, two adjacent normal cardiac cycle difference more than 50 mi- les the heart beat of the percentage of the number of full cardiac） with triangle indices were significantly lower than sailing before 5- 15 clays and return after 5-15 days, and the difference was statistically significant （P 〈 0. 05 ） ;the above indicators were compared with the first five to 15 days before the voyage, and the difference was not statistically significant（ P 〉 0. 05 ） ;70-80 days, mechanical and e- lectrical department crews heart rate variability each time domain index and triangle index were significantly lower than the mechanical and electrical department crews,rotating crews HRV each time domain index and triangle index were significantly lower than those of the rotating crews, and the difference was statistically significant （ P 〉 0.05 ）. Conclusion Long-term navigation can lead to crew＇ s autonomic nervous system dysfunction, which is partly reversible, as it recovers nearly to the previous level after voyage.