The purpose of this prospective multi-center, observational national registry in Switzerland is to obtain clinical baseline, procedural and follow-up data of all patients treated with TAVI in Switzerland and to assess short, mid- and long-term clinical outcome data of the CE approved devices. All centers in Switzerland implanting the CE approved devices for TAVI will be invited to include patients in the registry. Each site will collect baseline and procedural data as well as clinical outcome data up to five years.