122名健康退休老人STI的测定与分析

本文测量了122名老年退休教师的STI,其中男92名,女30名,均龄68.2岁,坚持锻炼者54名,未锻炼者68名。同时又将这122名从事脑力劳动的老年教师的STI与过去所测312名老年农民进行了分析比较,结果发现锻炼组与未锻炼组的STI有显著性差异。锻炼组的LVET较长(P<0.05),PEP较短(P<0.05),PEP/LVET较低(P(0.01)。老年农民与教师的STI比较同样有显著性差异(P<0.01)。从以上结果证明老年人坚持体育锻炼或长期户外劳动能提高心肌收缩功能,并能防止因年老而发生的心肌功能衰退现象。

MEASUREMENT AND ANALYSIS OF SYSTOLIC TIME INTERVAL IN 122 HEALTHY RETIRED ELDERLY TEACHERS

STI has become one of the established quantitative noninvasive tests of cardiac function. This paper presents a study on the effect of physical exercise on cardiac function in the elderly. 122 healthy elderly retired teachers ( 92 men and 30 women with the mean age of 68.2) were examined for STI. They were divied into 2 groups according to whether they took exercises or not. Group 1 included 54 exercised; group 2, 68 unexercised. Results show that the PEP/LVET ratio of the exercised group is significantly lower than that of the unexercised ( P<0.01 ) . we had examined 312 elderly farmers ( 60~83 years old ) for STI previously; the data of them compared with that of the 122 elderly teachers, show that there is a highly significant difference between them, the PEP/LVET of the farmers is much lower than that of the teachers.The results reveal that myocardial contractility reduces progressively with the rise of age, but outdoor manual labor or exercises can retard this change of the heart.