[1] Dept Cardiac Surg, Ctr Cardiologique Nord 36 Rue Moulins Gemeaux, F-93200 Saint Denis, Paris, France
[2] Univ Glasgow, Inst Cardiovasc & Med Sci, Glasgow G12 8QQ, Scotland
[3] Blackpool Victoria Teachinh Hosp, Lancashire Cardiac Ctr, Blackpool FY3 8NR, England
[4] Columbia Univ Div Cardiol, Echocardiog Lab, Mt Sinai Heart Inst, Miami Beach, FL 33140 USA