Ahmet Guner1, Semih Kalkan2, Mehmet Özkan3. 1. Department of Cardiology, Kosuyolu Kartal Heart Training & Research Hospital, Istanbul, 34846, Turkey. Electronic address: ahmetguner488@gmail.com. 2. Department of Cardiology, Kosuyolu Kartal Heart Training & Research Hospital, Istanbul, 34846, Turkey. 3. Department of Cardiology, Kosuyolu Kartal Heart Training & Research Hospital, Istanbul, 34846, Turkey; School of Health Sciences, Ardahan University, Ardahan, Turkey.