Abstract Background Functional classification is a critical predictor to establish a prognosis for heart failure (HF) and Coronary Artery Disease (CAD). However, recent research has questioned the reproducibility of the New York Heart Association (NYHA) and Canadian Cardiovascular Society (CCS) classifications, and their ability to discriminate patient prognosis at an individual level. Objective To investigate the discordance rate between the NYHA/CCS class assigned by the physician during outpatient consultation and the 6-minute walk test (6MWT) performance to refine the assessment […]