Ventricular Septal Defect Topic Guide
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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Tetralogy of Fallot Tetralogy of Fallot is a congenital heart defect that is the most common among newborns who have heart defects. Abnormalities in all four chambers of the heart ultimately lead to a failure to fully oxygenate the blood. In sever cases, the baby may turn blue, but other cases may present more subtle symptoms including slow growth, shortness of breath and easy tiring.