Coronary Flow Velocity Reserve Assessed by Transthoracic Doppler: The iPOWER Study: Factors Influencing Feasibility and Quality

•Measurement of CFVR by echocardiography is highly feasible. •In this study, 89% of CFVR examinations were of good quality. •CFVR is underestimated when examination quality is low. •Examination quality is associated with diabetes, BMI, and operator experience. •Awareness of bias due to quality may aid the interpretation of estimates. Background Coronary flow velocity reserve (CFVR) measured by transthoracic Doppler echocardiography is a...