Comparison of the RV contractile reserve in 4 groups of patients: Arrhythmogenic right ventricular cardiomyopathy (ARVC) patients; endurance athletes with a dilated RV, endurance athletes with normal RV, untrained subject with normal RV.~Patients will come to the hospital for 3 visits (3 half days):~Visit 1: clinical evaluation, rest ECG, rest echocardiography, cardio-pulmonary exercise test.~Visit 2: exercise echocardiography, holter ECG monitor (48 yours)~Visit 3: rest CMR and exercise CMR (ergocycle)
Prospective, nonrandomized, single-center, comparative study to define if right ventricular (RV) contractile reserve assessed by exercise CMR helps to improve the differential diagnosis between pathological and physiological remodeling of the RV; ie. arrhythmogenic right ventricular cardiomyopathy (ARVC) and athlete's heart.