Evolution of the PR Interval in Patients Implanted With a Pacemaker Using the SafeR Mode

Inclusion Criteria: * Patient implanted (primo-implant, replacement, upgrade) with a Sorin Group™ dual chamber pacemaker according to current available guidelines and IFU from less than three months. * Since implantation, the device is programmed in SafeR mode * Patient agreed to participate, after having received the appropriate and mandatory information Exclusion Criteria: * Patient contraindicated for cardiac pacing, according to current available guidelines * Permanent atrial fibrillation * Permanent high-degree AV block * Patient not available for routine follow-up visits * Patient already included in another clinical study * Inability to understand the purpose of the study / refusal to cooperate * minor age * Pregnancy * Life expectancy less than 12 months * Under guardianship