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.
Assuntos
Angiografia Coronária , Doença das Coronárias/diagnóstico , Angiocardiografia , Eletrocardiografia/métodos , Teste de Esforço , HumanosAssuntos
Infarto do Miocárdio/terapia , Fibrilação Ventricular/epidemiologia , Adulto , Idoso , Unidades de Cuidados Coronarianos , Feminino , Hemodinâmica , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/complicações , Infarto do Miocárdio/epidemiologia , Fibrilação Ventricular/terapiaRESUMO
Exercise electrocardiograms were done on one thousand patients referred to the laboratory of exercise tests for: suggestive symptoms of acute heart failure, old miocardial infarction abnormal resting ECG, or evaluation of coronary reserve. The average value of cardiac rate reached for the group, was close to 80%. The maximum exercise loads managed by the men were superior to those of the women, and in general those managed in the negative test were superior in relation to the positive tests. Of the one thousand cases, 20.2% had positive exercise ECG's. There was no difference inthe percentages of positivity between the two sexes, 20.75% and 19.11% for men and women respecitvely. The percentages of positivity are greater in those subjects sent to the laboratory for suspicion of angina pectoris, old MI, or abnormal resting ECG, than in those referred for detection of ischemic heart disease. The groups of patients with diabetes mellitus, arterial hypertension, old MI, and abnormal resting ECG had the highest incidence of positive tests: 41%, 37.5%, 30.6%, and 28.2% respectively. The most frequent localization of the ST segment alterations was the anterior portion, with percentages of 85.1% similar to those mentioned in the literature. The frequency of arrithmias, of 12.4% in this group, is a little less than that described in similar groups, but it corroborates the predominance of non-lethal ventricular arrithmias. The mortality in the tests performed was null.