<qa>  What is the range between fit to frail?Chronological age does not always reflect biological age and there is a wide range between fit to frail 14. A well established and validated frailty score based on relatively simple and feasible tests could help in our everyday practice to evaluate the prognosis of elderly people undergoing TAVI and to determine those patients who really benefit from the procedure. Post-Operative Cognitive Dysfunction POCD in patients undergoing TAVI andor SAVR was examined in only a few studies published during the last 10 years. Examinations and investigation of finer, long-term and possibly positive post-operative cognitive outcomes following TAVI and SAVR are significantly under-represented in the current medical literature 15. 