Does the severity of low-gradient aortic stenosis classified by computed tomography-derived aortic valve calcification determine the outcome of patients after transcatheter aortic valve implantation (TAVI)? - Fischer-Rasokat U; Renker M; Liebetrau C; Weferling M; Rolf A; Doss M; Möllmann H; Walther T; Hamm CW; Kim WK (European radiology, 2021)