The author discusses a study by M.M. Mohareb and colleagues on applying of appropriate use criteria (AUC) to diagnose catheterization to a cohort of patients known as angiography. Topics discussed include guidelines by the American College of Cardiology Foundation to use cardiovascular procedures such as diagnostic catheterization, revascularization, and echocardiography, study on patient with history of coronary artery disease (CAD), and impact of AUC in delivering medical care.