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The replacement of the aortic valve by percutaneous approach (called TAVI) is a therapy which is booming in the management of aortic stenosis. It concerns patients who have a high surgical risk presenting comorbidity, for whom a classic approach by surgery of valvular replacement seems unreasonable. Beyond its feasibility, the implantation of a TAVI is less invasive and improves the patient's morbi-mortality. The appearance of a Left Bundle Branch Block (LBBB) is one of the most frequent complications of this procedure and represents an important risk of atrio-ventricular (AV) high grade conductive disorders requiring permanent pacing in 5 in 15 % of the cases in 1 year. De novo LBBB is associated with a more important morbi-mortality in post-TAVI situation. However, there are no predictive elements of these conductive disorders. Besides, the incidence and the deadline of appearance of this AV disorders are not established. It seems relevant to propose a new stratification based on ECG and endocavitary data. The monitoring of the conductive disorders is allowed by remote monitoring thanks to the implantation of a pacemaker or an implantable holter allowing to determine the incidence and the deadline of appearance of high grade AV conduction disorders.