CABG indicates coronary artery bypass graft surgery; CCTA, cardiac computed tomography angiography; CMR, coronary magnetic resonance; COR, class of recommendation; CCTA, computed tomography angiography; CMR, cardiac magnetic resonance; ECG, electrocardiogram; Echo, echocardiography; LOE, level of evidence; MPI, myocardial perfusion imaging; N/A, not available; PCI, percutaneous coronary intervention; and SIHD, stable ischemic heart disease. Fihn et al Stable Ischemic Heart Disease: Full Text e431 Class IIa 1. Nuclear MPI, echocardiography, or CMR with ei- ther exercise or pharmacological stress can be useful for follow-up assessment at 2-year or longer inter- vals in patients with SIHD with prior evidence of silent ischemia or who are at high risk for a recur- rent cardiac event and a) are unable to exercise to an adequate workload, b) have an uninterpretable ECG, or c) have a history of incomplete coronary revascularization.10,12,15 (Level of Evidence: C) Class IIb 1. Standard exercise ECG testing performed at 1-year or longer intervals might be considered for follow-up assessment in patients with SIHD who have had prior evidence of silent ischemia or are at high risk for a recurrent cardiac event and are able to exercise to an adequate workload and have an interpretable ECG. (Level of Evidence: C) 2. In patients who have no new or worsening symptoms or no prior evidence of silent ischemia and are not at high risk for a recurrent cardiac event, the useful- ness of annual surveillance exercise ECG testing is not well established. (Level of Evidence: C) Class III: No Benefit 1. 