Tetralogy of Fallot causes
Tetralogy of Fallot
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A ventricular septal defect (VSD) is a hole between your heart's lower chambers, or ventricles. Read more about this condition.
Your pulmonary valve rests between your right ventricle and your pulmonary artery, which sends oxygen-poor blood to your lungs. The valve acts as a doorway that lets blood into and out of your heart. If your pulmonary valve does not open properly ...