Bangladesh Medical Research Council (BMRC)
Tetralogyof fallot(TOF)is a well-recognized complex cardiac anatomic abnormalities arising from the mal-development of the right ventricular infundibulum and is the most common form of cyanptic congenital heart disease with an incidence of 8-I0% of all congenital heart disease1. In 1888, Etienne-Louis Arthur Fallot first described TOF, which consists of a defect of the ventricular septum, pulmonary stenosis, dextroposition of the aorta and right ventricular hypertrophy2. TOF invariably presents with cyanosis in infancy but when the RVOT obstruction is mild, patients often have minimal to no cyanosis so called pink tetralogy or acyanotic fallot1.