Unstable angina and/or symptomatic congestive heart failure requiring hospitalization within the last months; transmural myocardial infarction within the last months prior to study entry Transmural myocardial infarction within the last months Transmural myocardial infarction within months prior to step registration Transmural myocardial infarction within the last months Transmural myocardial infarction within the last months Transmural myocardial infarction within the last months prior to registration A history of congestive heart failure, transmural myocardial infarction, symptomatic valvular disease, or high-risk arrhythmia Evidence of transmural infarction on ECG Evidence of transmural infarction on electrocardiogram (ECG) Transmural myocardial infarction or unstable angina within months prior to study registration Transmural myocardial infarction within the last months prior to registration Transmural myocardial infarction, unstable angina, or congestive heart failure requiring hospitalization within the last months