Muhittin Demirel1, Cüneyt Toprak2, Mehmet Mustafa Tabakçı2, Lütfi Öcal3. 1. Department of Cardiology, Kartal Koşuyolu Cardiovascular Training and Research Hospital, İstanbul, Turkey. muhi7343@gmail.com. 2. Department of Cardiology, Kartal Koşuyolu Cardiovascular Training and Research Hospital, İstanbul, Turkey. 3. Department of Cardiology, Ümraniye Training and Research Hospital, İstanbul, Turkey.