Ishikawa M, Ishikawa K
Br Heart J. 1986 Aug;56(2):176-8. doi: 10.1136/hrt.56.2.176.
The influence of profuse sweating on systolic time intervals was investigated. Systolic time intervals were recorded in 21 healthy men before and after sauna bathing. After sauna bathing the ejection time was significantly shortened and the pre-ejection time and ratio of pre-ejection time to ejection time (PEP:ET) were significantly increased. The upper limit of the PEP:ET ratio is generally believed to be 0.42 and this ratio increases when left ventricular performance is impaired. Before sauna bathing the PEP:ET ratio was less than 0.42 in all 21 men, but after sauna bathing it was greater than 0.43 in six (28.5%) of them. Systolic time intervals measured after profuse sweating can give a false impression of cardiac function.
研究了大量出汗对收缩期时间间期的影响。在21名健康男性桑拿浴前后记录收缩期时间间期。桑拿浴后射血时间显著缩短，射血前期时间以及射血前期时间与射血时间之比（PEP:ET）显著增加。一般认为PEP:ET比值的上限为0.42，当左心室功能受损时该比值会升高。在桑拿浴前，所有21名男性的PEP:ET比值均小于0.42，但桑拿浴后，其中6人（28.5%）的该比值大于0.43。大量出汗后测量的收缩期时间间期可能会给心脏功能造成错误的印象。
