Benefit of Permanent Stimulation of the Left Branch of the His Bundle Versus Right Ventricular Stimulation After Atrioventricular Node Ablation for Rapid Atrial Fibrillation

Inclusion criteria

• / Pacemaker implanted patient with LBTP lead and back-up right ventricular lead who subsequently underwent successful atrioventricular node ablation for rapid AF 2) NAV ablation procedure performed less than 15 days ago 3) Age ≥ 18 years 4) Woman of childbearing age with effective contraception (estrogen-progestin or intrauterine device or tubal ligation) for at least 1 month and for the duration of the study, and a negative urine pregnancy test by B-HCG at inclusion Or, Postmenopausal woman: confirmatory diagnosis (non-medically induced amenorrhea for at least 12 months prior to the inclusion visit).
• \) Membership of a social security scheme 6) Patient follow-up feasible 7) Patient has read and understood the information leaflet and signed the informed consent form

Exclusion criteria

• Impairment of autonomy such that a maximal cardiorespiratory effort test (VO2 Max test) cannot be performed under good conditions (ADL scale \< 5).
• LVEF \< 40% at inclusion
• Person deprived of liberty by an administrative or judicial decision, or person under court protection, sub-guardianship or curatorship.
• Patient participating in another interventional trial
• Any history of illness or psychological or sensory abnormality likely to prevent the subject from fully understanding the conditions required for participation in the protocol, or from giving informed consent.
• Pregnant, parturient or breast-feeding women, or those without proven contraception