Studies of The Simple Medical Check Method by Index with Change of Cardiac Function in Physical Exercise.

运动过程中ST水平持续下降的干扰发生在170次/分左右。考虑了心率的变化，以及心率的增加和运动时间对心率的影响。为了阐明这些影响，两种运动，5分钟。和10分钟。用自行车测力器对健康青年进行约170次/分的运动负荷。记录并测量心电图、心率、心输出量和呼吸频率。采用ST段计算机（Quinton）分析心电图ST段下降和ST段斜率。有限公司)。所得结果如下图所示；5分钟内心率和ST段压降的平均值。和10分钟。运动为20次/分。， 10次/分，-0.55mm/分。-0.18mm/min。, respectively.2。ST抑郁有较大的个体差异，ST抑郁均值有较大的标准差。然而，尽管5分钟和10分钟的运动没有显著差异，但高达150次/分钟的运动没有显著差异。心率150次/分以上。许多受试者在运动5分钟后表现出比运动10分钟时更高的ST抑郁。在运动时心率水平相同的情况下，5分钟内的心排血量、呼吸速率和血压无显著差异。和10分钟。exercisis。从这些结果来看，在相同的心率下，超过150次/分，不同的ST降。，提示由于运动引起的急性心率升高会引起较强的ST段抑制，因此在运动中应采用感知评价法，采取足够的运动时间以达到目标心率。

Disturbance of contineous decrease of ST level during exercise occured at about 170 beats-min. of heart rate and influences of the increased heart rate and exercise time on it were considered. To clarify these influences, two kinds of exercise, 5-min. and 10-min. of exercises to attain an about 170 beats/ min, were loaded to young healthy subjects by using bicycle ergometer. ECG, heart rate, cardiac output, and respiration rate were recorded and measured. ST depression and ST slope on ECG were analyzed by ST-segment computer (Quinton. Co Ltd.). Obtained results were as lollows;1. Means of heart rate and ST depression during 5-min. and 10-min. exercises were 20beats/min., 10 beats/min, -0.55mm/min., and -0.18mm/min., respectively.2. ST depression had a large individual difference and mean of ST depression had a large standard deviation. However, despite of there were not significant differences in ST depressions between 5 min. and 10min. exercises up to 150 beats/min. of heart rate,above 150 beats/min., many subjects showed higher ST depressionsin 5 min. exercise than those in 10min. exercise.3. At same heart rate level during exercise, there were not significant differences in cardiac output, respiration rate, and blood pressure between 5-min. and 10-min. exercisis.From these results, different ST depressions at same heart rate, above 150 beats/min., indicate that as acute increase of heart rate by exercise introduce a stronger ST depression, enough exercise time to aftain target heart rate should be taken in exercise by perceptive evaluation method.