Brain tumor, breast cancer, colon cancer, congenital heart disease, heart arrhythmia. See more conditions.
A ventricular septal defect (VSD) is a hole in the heart that's present at birth (congenital heart defect). The hole is between the lower heart chambers (right and left ventricles). It allows oxygen-rich blood to move back into the lungs instead of being pumped to the rest of the body.
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