Atrial Function and Supraventricular Arrhythmia of the Veteran Athlete.

"Subjects will be retrospectively retrieved from the Sport Medicine Service of Rennes University Hospital database.~Medical data will then be collected from the athletes' medical records. The ECG present in the medical file will be reinterpreted to obtain the resting heart rate, the amplitude of the P wave, the morphology of the P wave and the duration of the PR space.~The data from the stress test will be found from reports in the medical records: resting heart rate, maximum heart rate, sustained peak load, arrhythmia during the test.~ETTs will be retrieved from the local server. They will be reinterpreted to collect anatomical and functional cardiac data necessary for the study."