The sponsor, in consultation with the coordinating investigator, had decided to stop enrolment prematurely because the enrolment rate would not have made it possible to reach the target of 142 patients without increasing the duration of the study

The purpose of the study is implantation of a Pacemaker at 30 days for occurrence of a high-grade conduction disorder per- or post-procedure (yes/no)

The main objective is to assess the predictive value of the pre-TAVI infrahelic conduction time interval (infraheal conduction time measured before percutaneous aortic valve implantation) on the risk of Pacemaker implantation at 30 days post-TAVI, in patients with right bundle branch block prior to surgery.

The aim of the study is to identify a pre-interventional marker of the risk of rhythmological complication after the TAVI procedure (Transcatheter Aortic Valve Implantation), in order to better anticipate it.

This is an interventional, prospective, longitudinal (follow-up: 12 months), multicenter (4 centers) study.

Inclusion Criteria:

• Patient suffering from severe aortic stenosis, eligible for a TAVI procedure (Transcatheter Aortic Valve Implantation) ;
• Patient presenting with complete right bundle branch block during the pre-TAVI electrocardiogram, with QRS interval ≥ 120 ms (depolarization of the ventricles);
• Patient able to understand the information related to the study, to read the information leaflet and agreeing to participate in the study. ;
• Patient having signed a consent.

Exclusion Criteria:

• Contraindication to Transcatheter Aortic Valve Implantation ;
• Patient under guardianship or curatorship, or under a regime of deprivation of liberty;
• Patient participating in another clinical trial, or in a period of exclusion from another clinical trial;
• Patient not benefiting from a social security scheme.