運動負荷心電図の判定基準に関する研究 とくにSingle two-step testについて
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概要
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This study has been performed on a total of 427 cases whose courses and prognosis were followed for one to six years, up in order to determine the most useful electrocardiographic criteria of the single two-step exercise test.<BR>The subjects were classified into the following five groups.<BR>Group 1: coronary-sclerotic patients (typical angina pectoris etc.) ; 41 cases, <BR>Group 2: patients with possible or undeniable coronary sclerosis; 120 cases, <BR>Group 3; patients not associated with cardiovascular diseases; 95 cases, <BR>Group 4: patients with NCA; 90 cases, and Group 5: normal healthy persons; 81 cases.<BR>The cases with definite ST·T change, bundle branch block and auricular fibrillation in resting electrocardiograms were not included for this study.<BR>The author would like to propose the new criteria which is better than the previous criteria.<BR>Considering Q-Q line as reference base line, the following change in ECG in any lead except Lead III and/or V<SUB>2</SUB> was interpreted as abnormal response.<BR>(1) Any depression of ST or J of 1.5mm or more.<BR>(2) Ischemic ST depression of 0.5mm or more.<BR>(3) Junctional ST depression of 0.5mm or more, measuring at the point 0.04 sec. apart from J and accompanied by QX/QT ratio of 50 per cent or more and/or QT ratio 1.08 or more.<BR>(4) Inverted or isoelectric T waves.<BR>Utilizing above criteria, 53.1 per cent of abnormal response has been found in ST depression in the first or coronary-sclerotic group, that is, almost the same with the Master's classic criteria, while about 10 per cent in the third and fourth group, decreasing the number of false-positive incidence.
- 昭和大学・昭和医学会の論文