title: Body surface distribution of exercise-induced ST depression in patients with angina pectoris.
abstract: In 38 patients with angina pectoris, 87 unipolar lead electrocardiograms were recorded from different sites over the entire thoracic surface both before and after submaximal treadmill exercise. The site of exercise-induced ST depression on the body surface was correlated with the findings of the coronary arteriography. The number of leads which showed exercise-induced ST depression was 7.2 +/- 1.8 in one vessel disease, 15.6 +/- 2.1 in two vessel disease, and 23.6 +/- 2.0 in three vessel disease (values are mean +/- SEM). Thus, the number of leads showing ST depression was proportional to the severity of the coronary artery disease. Exercise-induced ST depression was most often seen in left anterior chest leads, especially in V5 of the standard 12-ECG. However, it was not possible to identify the obstructed coronary artery from the body surface distribution of ST depression.
mesh_terms: D000368:Aged; D000787:Angina Pectoris / Q000503:physiopathology*; D017023:Coronary Angiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion