TY - JOUR TI - Thebesian valve: the cause of unsuccessful retrograde coronary sinus cannulation AU - Holda, M.K. AU - Koziej, M. AU - Klimek-Piotrowska, W. JO - The Anatolian Journal of Cardiology PY - 2015 VL - 15 SP - 5008 EP - 5009 DO - 10.5152/akd.2015.5952 ER -