Risk Assessment in Patient Selection for Transcatheter Aortic Valve Replacement.

Risk assessment models for transcatheter aortic valve replacement (TAVR) versus surgical aortic valve replacement in high-risk patients and TAVR versus palliation in inoperable patients are based on surgical data and have limited discrimination and calibration in the setting of TAVR. Several novel risk models specifically designed for TAVR have improved discrimination over existing models but require further validation. Several clinical and echocardiographic variables, such as chronic lung disease, mitral regurgitation, and stroke volume index, influence outcomes. This article reviews current and novel risk models and important predictors of TAVR outcomes and proposes a framework to integrate them into clinical decision-making for patients with severe, symptomatic aortic stenosis.