Ventricular Septal Defect Topic Guide

Ventricular Septal Defect Ventricular Septal Defect: Ventricular septal defect is a congenital heart condition in which there is a hole in the wall separating the ventricals, the two lower chambers of the heart. The hole allows oxygenated blood to mix with unoxygenated blood and recirculate. Left untreated by corrective surgery, this can cause the heart to work so hard it fails, along with a host of other problems including pulmonary hypertension.
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