The EASE-IT CT Registry

Inclusion Criteria: Investigational CTA-only Cohort * Consecutive adult patients ≥ 75 years * Consecutive patients with severe AS (symptomatic or asymptomatic) with a guideline-based indication to undergo implantation of a transcatheter heart valve of the SAPIEN family * Ability to undergo CTA * Patient is scheduled to undergo a 30 Day and 3 Months follow-up CTA+ICA control Cohort * Consecutive adult patients ≥ 75 years * Consecutive patients underwent implantation of a transcatheter heart valve of the SAPIEN family because of severe aortic stenosis * Ability to undergo CTA and ICA Exclusion Criteria: investigational CTA-only Cohort * Patients with already diagnosed proximal stenosis of the left anterior descending artery (LAD) OR the left main coronary artery (LM) ≥50% * Any prior coronary revascularization / prior aortic valve replacement * Life expectancy below 12 months * Lack of informed consent / data protection statement CTA+ICA control Cohort * Patients diagnosed with proximal stenosis of the left anterior descending artery (LAD) OR the left main coronary artery (LM) ≥50% already at baseline * Any prior coronary revascularization / prior aortic valve replacement * Life expectancy below 12 months * Lack of informed consent / data protection statement