Reviewers RWI information was collected and distributed to the writing group and is published in this document (Appendix 2). This document was approved for publication by the govern- ing bodies of the ACC, AHA, and by other partner organiza- tions, the AATS, PCNA, SCAI, and STS. 2. Diagnosis of Sihd 2.3. Invasive Testing for Diagnosis of Coronary Artery Disease in Patients With Suspected SIHD: Recommendations (New Section) See Online Data Supplement 1 for additional information. Class I 1. Coronary angiography is useful in patients with pre- sumed SIHD who have unacceptable ischemic symp- toms despite GDMT and who are amenable to, and candidates for, coronary revascularization. (Level of Evidence: C) Class IIa 1. Coronary angiography is reasonable to define the extent and severity of coronary artery disease (CAD) in patients with suspected SIHD whose clinical char- acteristics and results of noninvasive testing (exclusive of stress testing) indicate a high likelihood of severe IHD and who are amenable to, and candidates for, (Level of Evidence: C) 2. Coronary angiography is reasonable in patients with suspected symptomatic SIHD who cannot undergo diagnostic stress testing, or have indeterminate or nondiagnostic stress tests, when there is a high likelihood that the findings will result in important changes to therapy. (Level of Evidence: C) Class IIb 1. Coronary angiography might be considered in patients with stress test results of acceptable quality that do not suggest the presence of CAD when clini- cal suspicion of CAD remains high and there is a high likelihood that the findings will result in important changes to therapy. (Level of Evidence: C) This section has been added to the 2014 SIHD focused update to fill a gap in the 2012 SIHD guideline.4 It specifically addresses the role of coronary angiography for the diagnosis of CAD in patients with suspected SIHD. 