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Ventricular Septal Defect (VSD)

Definition

A ventricular septal defect (VSD) means an abnormal hole, present at birth, in the wall separating the two lower chambers (ventricles) of the heart. This means that blood blows in the wrong direction, and oxygen-rich blood gets pumped back to the lungs instead of out to the body. A small hole may not cause any problems. Larger holes may need surgery.

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