抄録
A coincidence between a location of myocardial ischemia by angiography and by an electrocardiography was studied on the 22 patients with myocardial infarction and 32 angina pectoris.
These patients having both ischemic ST-T change in the electrocardiogram and significant stenosis of the coronary arteries were selected from the cardiology department of the Center for Adult Diseases.
A mean value of the number of the affected vessels in the myocardial infarction was 2.5 and higher than that in angina pectoris in which the number was 1.7 (p less than 0.005).
In the cases with myocardial infarction, the Q wave localization coincided nicely with both coronary artery stenosis (68.8%) and myocardial asynergy (74.1%).
On the other hand, the location of ischemic ST-T change in the cases with angina pectoris coincided with coronary artery narrowing in 50.0%.
In the study of each coronary artery, 67.9% of the stenosis of left anterior descending artery represented abnormal Q wave in V1-V4 in myocardial infarction, 47.8% of that of right coronary artery represented Q wave in II, III and aVF and 30.4% of that of left circumflux artery represented Q wave in I, aV′L, V5 and V6.
On the other hand, 94.7% of significant stenosis of left coronary artery represented ischemic ST-T change in anterior chest leads or I, aVL after Master's double 2-step test in angina pectoris and 64.0% of that of right coronary artery represented ischemic ST-T change in II, III and aVF.
Although the accuracy of electrocardiogram as a reliable indicator of ischemic heart disease has remained a controversial subject, elctrocardiogram is often of value in indicating sites of coronary arterial stenosis and ventricular asynergy.
