Ismail Al Abri1, Ghaliah Al Mohani2, Carsten W Israel3. 1. National Heart Center, Royal Hospital, Muscat, Sultanate of Oman. ismailabri@yahoo.com. 2. National Heart Center, Royal Hospital, Muscat, Sultanate of Oman. 3. Evangelisches Klinikum Bethel, Bielefeld, Germany.