IRCT20180724040575N2 IRCT 2020-09-28 Shahid Beheshti University of Medical Sciences The effect of carnitine on liver function Evaluation of the effectiveness of oral L-carnitine on liver function in children undergoing congenital heart defect repair surgery 2019-10-23 anticipated 60 Complete https://irct.ir/trial/50803 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Prevention, Randomization description: The study was designed as a randomized clinical trial using a random number table, Blinding description: Patients, parents, and those involved in surgery and subsequent care and data recorders are blind to the study groups.The parents confirm the consent but are not aware of being in which group. Based on randomization, the drug or placebo is given to the patient the night before the operation. Members of the intraoperative and postoperative care team as well as data recorders are not aware of the study group. 3 Surgery for repair of congenital heart lesions. Intervention 1: Intervention group: Administration of 100 mg / kg oral L-carnitine, the night before surgery. Intervention 2: Control group: Administration of 1 ml per kg oral serum of normal saline, the night before surgery. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No extra informations