Chifamba J, Mufunda J, Sigola L B, Matenga J A, Sparks H V
Department of Physiology, University of Zimbabwe Medical School, Harare, Zimbabwe.
Cent Afr J Med. 1998 Feb;44(2):37-40.
To study the effect of variation in environmental temperature on blood pressure and pulse.
Repeated blood pressure and pulse measurements in volunteers on two days when environmental temperatures differed by 10 degrees C.
Part of an ongoing community based study.
25 Black subjects (23 males and two females) volunteered from a population cohort participating in an ongoing longitudinal study examining cardiovascular risk factors in an urban African Black environment.
Mean systolic and diastolic blood pressures and pulse rates.
The systolic and diastolic blood pressures were significantly higher when recorded at 15 degrees C than at 25 degrees C, mean difference 32.2 +/- 4.2, p < 0.001 and 19.5 +/- 3.0 p < 0.001) for systolic and diastolic blood pressures respectively. The pulse rate per minute at 15 degrees C was significantly lower than at 25 degrees C (mean difference 11.1 +/- 3.2 p = 0.002).
A decrease in environmental temperature by 10 degrees C appears to increase blood pressure. Awareness of this phenomenon is important, especially when surprisingly high blood pressures are observed during low ambient temperatures, to avoid over diagnosis of hypertension. This phenomenon, together with that already established of the white coat hypertension, may lead to the erroneous diagnosis of hypertension.
研究环境温度变化对血压和脉搏的影响。
在环境温度相差10摄氏度的两天内，对志愿者进行重复的血压和脉搏测量。
一项正在进行的社区研究的一部分。
从参与一项正在进行的纵向研究的人群队列中招募了25名黑人受试者（23名男性和2名女性），该纵向研究在城市非洲黑人环境中检查心血管危险因素。
平均收缩压、舒张压和脉搏率。
在15摄氏度时记录的收缩压和舒张压显著高于25摄氏度时，收缩压和舒张压的平均差值分别为32.2±4.2，p<0.001和19.5±3.0，p<0.001。15摄氏度时的每分钟脉搏率显著低于25摄氏度时（平均差值11.1±3.2，p = 0.002）。
环境温度降低10摄氏度似乎会使血压升高。认识到这一现象很重要，尤其是在环境温度较低时观察到血压异常高时，可避免高血压的过度诊断。这一现象，连同已确定的白大褂高血压现象，可能导致高血压的错误诊断。
