1. Department of cardiology; Bicetre Hospital, AP-HP; Le Kremlin-Bicêtre France
2. Department of cardiology; Lariboisiere Hospital, AP-HP; Paris France
3. Paris-Sud University; Le Kremlin-Bicêtre France
4. INSERM UMRS 942; Paris France
5. Paris-Diderot University; Paris France
6. Department of Physiology; Bicetre Hospital, AP-HP; Le Kremlin-Bicêtre France