Jesu Krupa1, Paul T L Chiam2, Yeow Leng Chua3, See Hooi Ewe4. 1. Department of Cardiology, National Heart Centre Singapore, 17 Third Hospital Avenue, Mistri Wing, Singapore 168752, Singapore Department of Cardiology, DDMM Heart Institute, Nadiad, Gujarat, India. 2. Department of Cardiology, National Heart Centre Singapore, 17 Third Hospital Avenue, Mistri Wing, Singapore 168752, Singapore. 3. Department of Cardiothoracic Surgery, National Heart Centre Singapore, Singapore, Singapore. 4. Department of Cardiology, National Heart Centre Singapore, 17 Third Hospital Avenue, Mistri Wing, Singapore 168752, Singapore ewe.see.hooi@nhcs.com.sg.