A scientific seminar about (Single ventricle Physiology and fontan surgery operation in Pediatric patients), held at the CME hall of Kirkuk Medical College on 28/4/2019 and it given by Assist.Prof. Dr. Ziyad Muhammad Sadiq /Pediatric Medicine. The seminar included single ventricle Physiology, its effects on the blood vessel, and proper surgical interventions. The main objective of the seminar was to make the attendants realize the importance of single ventricle mechanism of action and the latest updates regarding treatment methods and possible complications of the disease.