 To estimate the correlation between the HFS, and the in-hospital stay, 30 day and 1-year outcomes evaluated according to the VARC 2 Criteria. The benefit of this study is to conclude exact data about quality of life and provide a comprehensive investigation of pre- and post-TAVI cognitive outcomes. We plan to define that apart from the incidence of possible neurological signs and the radiological evidences of neurogical injury and POCD, there is no decline in long term cognitive functions and there is improvement in the long term quality of life QoL. 