Syncope is a common symptom that may be related to a conductive disorder. If no bradycardia is authenticated, it is often necessary to implant an implantable loop recorder.

In somes cases, implantable loop recorder records cardiac conductive disorders. In this study, we want to try to identify a group of patients for whom we could immediately implant a pacemaker without prior implantation of an implantable loop recorder given the high probability of implantation of a pacemaker after interrogation of the implantable loop recorder. It would be interesting for the reduction of interventions for the patients and for the economic aspect of the healthcare system

Inclusion Criteria:

• All patients who have benefited from an Implantable Loop recorder in the Nancy's Teaching Hospital

Exclusion Criteria:

• No Exclusion Criteria

All patients who have benefited from an Implantable Loop recorder in the Nancy's Teaching Hospital between 1 January 2010 and 31 decembre 2019

anonymous individual datas for baseling pre implantatory caracteristcs and clinical outecome would be available

6 month

Data access request will be reviewed by investigator team. Requestors will be required to signe a data access agreement