運動負荷中における心機能監視の一方法 : S-T Segment Computer による心臓前壁,側壁,下壁各部の虚血状態の解析

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The electrocardiographic S-T Segment depression included by exercise is well understood as an myocardial ischemia. We have studied analysis of S-T segment level and S-T slope with S-T Segment Computer in healthy adult males who underwent treadmill running as intensional fixed quantity exercise in response to previously difined level of heart rate. In our former reports, most of the subjects developed to increase the rate of S-T slope take with depression of S-T segment level. However, one of the subjects showed the depression of S-T segment level and S-T slope and besides inversion or flattening of T-wave. In this case, widely myocardial ischemia might be occurred. The purpose of this study is to investigate regional myocardial ischemia for anterior, lateral and inferior walls by changes of S-T segment level and S-T slope on electrocardiogram. S-T segment level and S-T slope were obtained by S-T Segment Computer using bipolar chest leads in all subjects, who underwent treadmill running under the defined level of heart rate as 150B/min. A series of patterns showed during running of the normal adult males was analysed. The obtained results are as follows, 1) Changes of S-T segment level and S-T slope during exercise. anterior wall; S-T segment level not change or depressed and S-T slope decreased. lateral wall; S-T segment level depressed and S-T slope increased. inferior wall; S-T segment level depressed and S-T slope increased. 2) Changes of S-T segment level and S-T slope after exercise. anterior wall; S-T segment level recovered and S-T slope recovered or more decreased. lateral wall; S-T segment level recovered and S-T slope recovered. inferior wall; S-T segment level recovered and S-T slope recovered. The continuous monitoring of ECG patterns served for detecting the simultaneous of the decline is S-T segment level unaccompanied by the abnormal ECG curves, such as extrasystole. And from the above observations, there is no increase in S-T slope, there will be a reliable possibility of recognizing the occurrence of ischemic stutas of heart muscle. Further study on the present subject is now in progress.
東海大学の論文

運動負荷中における心機能監視の一方法 : S-T Segment Computer による心臓前壁,側壁,下壁各部の虚血状態の解析

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