RESUMO
A coronary angiography was taken to 80 patients whose twelve leads exercise ECG had been found positive. This group included 38 patients with old myocardial infarction and 42 with coronary insuficiency. When looking for a relation between: 1. The amount of positivity in the exercise ECG and the number on injured vessels, and 2. the ischemia located in the effort test and the blocked vessels shown by the angiography. We found a reasonable relation between the exercise ECG and the severity of the injuries. This co-relation is of 100% between the old infarction area and the severe or total obstruction of the corresponding vessel. It was observed then, that a close relation exists between the ischemia area and the obstructive injuries. In a second group of 15 patients we failed to find atero sclerotic injuries in the corresponding vessel, but observed some vascular anomalies which explained the ischemia. The effort test with twelve leads exercise ECG makes easier the localization of obstructions, single or multiple, on the area supposedly affected.