DefinePK

Abstract

Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart disease inchildren but occurs rarely in adults. The extent of cyanosis depends on the balance of systemicand pulmonary vascular resistance, which depends on the severity of right ventricular outletobstruction.3 The more severe the obstruction, the more blood flows into the left side causingdesaturation and cyanosis. The survival rate of patients who receive surgical full correction isabout 86% at 32 years follow-up and 85% at 36 years follow up.