环境大气压变化对年轻健康人心率及短程心率变异性影响的研究  

Effect of change of ambient atmosphere on heart rate and short-range heart rate variability in healthy youth

作　　者：李起栋 时翠华 洪钰锟 郭娟 

机构地区：[1]解放军第一七一医院,江西省九江332000

出　　处：《中华航海医学与高气压医学杂志》2008年第3期166-168,共3页Chinese Journal of Nautical Medicine and Hyperbaric Medicine

摘　　要：目的探讨环境大气压变化对年轻健康人心率（HR）及短程心率变异性（HRV）的影响。方法利用高压舱结合动态心电图对40例年轻健康人进行临床试验，记录升压前、升压过程中、高压状态、减压过程中及减压后各5min的平均心率及全部窦性心搏N-N间期标准差（SDNN）、相邻N-N间期差值均方根（RMSSD）、相邻N-N间期相差〉50ms占窦性心律百分数（PNN50）3项短程心率变异性时域指标，并进行统计学处理。结果环境大气压升高可使心率减慢，升压前（87．28±12．77）次／min，升压过程中（76．08±10．74）次／min，高压状态（75．30±12．06）次／min，升压前后比较差异有统计学意义（P〈0．01）；随着大气压的回落，心率逐渐加快，但未恢复到升压前水平；主要反映交感和迷走神经总张力的心率变异性指标SDNN和主要反映迷走神经张力的RMSSD、PNN50基本上随着环境大气压升高而升高，随着大气压降低而降低。结论环境大气压的变化对心率和心率变异性有较明显的影响，当环境气压较快降低时，心血管的自主神经功能会被扰乱。Objective To approach effects of change of ambient atmosphere on heart rate （HR）and short-range heart rate variability （HRV） in healthy youth. Methods Forty healthy youths were observed by dynamic electrocardiogram（DCG） in a hyperbaric chamber. At the same time,average heart rates at different stages and indexes of HR, SDNN, RMSSD and PNN50 were recorded,respectivly. Subsequently, the data were disposed with the statistical treatment. Results HR decreased from （87.28±12.77）/min to （76.08±10.74） /min before and in boosting pressure, and reached （75. 30±12. 06 ） /min at high pressure （P〈0.01）. HR accelerated gradually when ambient pressure had returned to normal. Data of SDNN （ index of sympathetic and pneumogastric con-tonicity）, RMSSD and PNN50 （indexes of pneumogastric tonicity） increased or decreased by boosting or depressing of ambient atmosphere. Conclusions Changes of ambient atmosphere have much effect on HR and short-range HRV. Cardiovascular fuction of autonomic nerve may be deranged when ambient atmosphere decreased quickly.

关 键 词：环境大气压 高压舱 动态心电图 心率 心率变异性 

分 类 号：R686[医药卫生—骨科学]