CAJ | 학술논문

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5 min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＞50瑚占窦性心律百分数(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要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.
목적 탐토배경대기압변화대년경건강인심솔(HR)급단정심솔변이성(HRV)적영향.방법 이용고압창결합동태심전도대40례년경건강인진행림상시험,기록승압전、승압과정중、고압상태、감압과정중급감압후각5 min적평균심솔급전부두성심박N-N간기표준차(SDNN)、상린N-N간기차치균방근(RMSSD)、상린N-N간기상차＞50호점두성심률백분수(PNN50)3항단정심솔변이성시역지표,병진행통계학처리.결과 배경대기압승고가사심솔감만,승압전(87.28±12.77)차/min,승압과정중(76.08±10.74)차/min,고압상태(75.30±12.06)차/min,승압전후비교차이유통계학의의(P＜0.01);수착대기압적회락,심솔축점가쾌,단미회복도승압전수평;주요반영교감화미주신경총장력적심솔변이성지표요SDNN화주요반영미주신경장력적RMSSD、PNN50기본상수착배경대기압승고이승고,수착대기압강저이강저.결론 배경대기압적변화대심솔화심솔변이성유교명현적영향,당배경기압교쾌강저시,심혈관적자주신경공능회피우란.
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 PNN,,, 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 PNNjo (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.