A multicenter, randomized clinical trial. There are approximately 180 centers in the United States, Canada, Puerto Rico, and Italy. Patients are randomly assigned to treatment groups in which the addition of the angiotensin-converting enzyme (ACE) inhibitor trandolapril is compared to standard therapy. The primary endpoint includes a reduction in the incidence of cardiovascular death, nonfatal myocardial infarction, or the need for coronary revascularization (PTCA or CABG) in coronary artery disease patients with left ventricular ejection fraction of 40 percent or more. Secondary endpoints include the incidence of hospitalization for the management of either unstable angina, congestive heart failure, stroke, or cardiac arrhythmia. Recruitment started in November 1996 and ended in June 2000 with a minimum follow-up of five years.