To the Editor, The developers1 of the first rigorous predictive model for mortality after transcatheter aortic valve implantation (TAVI) have overcome the limitations of the previous surgical scores. While EuroSCORE I is an old and redundant model based on data of 1995 and derived from a highly heterogeneous patient group with different operations, techniques and demographics, this predictive model is based on new results of a remarkably homogeneous population (72.4% >80 years of age and all treated with TAVI procedures).1 Moreover, while EuroSCORE II developers included variables that were not significantly associated with the event by multivariate regression and did not analyse some important variables, …