A ventricular septal defect (VSD) is an abnormal communication between the right ventricle and left ventricle
A VSD can be a single defect or multiple defects.
A VSD can be found in isolation or associated with numerous variants of congenital heart disease (i.e.- TOF, truncus arteriosis, PA/IVS, transposition of the great arteries)
Epidemiology
Approximately 20% of all CHD
Incidence varies widely (5-50/100,000) and is likely underestimated
secondary to spontaneous closure of smaller defects in fetal life and early postnatal life