Objective: The aim of the present work was to ascertain the usefulness of exercise echocardiography performed prior to discharge following acute non-complicated myocardial infarction in the prognosis and detection of multi-vessel disease.
Patients And Methods: Sixty-five consecutive patients with primary episode of acute non-complicated myocardial infarction, with normal or slightly depressed ventricular function, were studied. Submaximal exercise test including echocardiogram pre- and immediately post-exercise were performed 7 to 10 days after infarction. Mean follow-up was 15 +/- 8 months; 15 patients presented angina, 9 revascularization and 1 died.
Results: Electrocardiographic ischaemia had low sensitivity and negative predictive value regarding complications (44% and 73% respectively); however, its specificity and positive predictive values were high (97% and 92%). In contrast, echocardiography-detected ischaemia showed much better sensitivity and negative predictive values (72% and 83%), with a slight decrease in specificity and positive predictive values (87% and 78%). Both remote ischaemia and the increase in global score > 0.25 during exercise were of high prognostic value (p < 0.001). Remote echocardiographic ischaemia yielded the diagnosis of multi-vessel disease with greater sensitivity than electrocardiographic ischaemia (84% vs 41%).
Conclusions: Exercise echocardiography is highly useful in the prognostic assessment of patients prior to discharge following acute non-complicated myocardial infarction. The ischaemia detected on sub-maximal exercise and assessed by echocardiography was much more sensitive than that detected by electrocardiography in the prediction of new coronary events and multi-vessel disease.
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