**1. Introduction**

The incidence of congenital heart disease varies from 6/1000 live births for moderate to severe forms and increases to ~75/1000 if trivial forms are included [1]. Ventricular septal defect (VSD) is a defect in the interventricular septum and one of the most common congenital cardiac anomalies accounting for up to 30% of all congenital heart defects [2]. Many trivial defects are unaccounted for as they close before one year of age or in fetal life and therefore, a precise prevalence is difficult to obtain. Prevalence is reported up to 5% in newborn babies [3]. They can occur in isolation or as a part of several other complex cardiac anomalies including tetralogy of Fallot, truncus arteriosus and atrioventricular septal defect. In this paper, we will primarily discuss isolated VSDs.
