Current physician guidelines do not recommend routine cardiac stress testing for patients with known heart disease. Previous studies, however, have shown that inducible ischemia is predictive of adverse cardiovascular events, whether it is accompanied by angina or not. Ischemia is an inadequate flow of blood to a part of the body, caused by constriction or blockage of the blood vessels. In this study, the researchers attempt to compare the risk of recurrent coronary heart disease (CHD) in outpatients with angina or inducible ischemia. Data were collected from 937 patients with known CHD who were participating in the Heart and Soul Study. Angina was assessed by questionnaire and ischemia by exercise stress echocardiography. Participants were followed for 3.9 years.