Title: Study on change levels and prognosticating low cardiac output, early outcome after total repair Tetralogy of Fallot in pediatric patients of high sensitivity troponin T Speciality: Anesthesiology - Intensive care Code: 62720121 Fulle name of PhD student: Tran Mai Hung Course: 33 Fulle name of Supervisor: Professor. PhD. Nguyen Quang Tuan New contributions of the thesis - This is the first prospective, descriptive research giving out the characteristics of change in hs-TnT levels to pre - and post-operative Tetralogy of Fallot (TOF) in Viet Nam on children.