A ventricular septal defect (VSD) occurs when there is direct communication between the left and right ventricles. This can be a congenital anomaly or acquired as a complication of a myocardial ...

Ventricular septal defect (VSD) is a birth defect in babies that causes a hole in the wall (or septum) between a baby’s lower heart chambers. Heart chambers are also called right and left ventricles.