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For more information, see: Mayo Clinic | Wikipedia
Atrioventricular Canal Defect, aka Endocardial cushion defect or Atrioventricular Septal defect. This defect occurs when a combination of several abnormalities in the heart are present at birth (congenital abnormalities). This defect occurs when there’s a hole between the chambers of the heart and problems with the valves that regulate blood flow in the heart. Atrioventricular canal defect allows extra blood to circulate to the lungs. Ensuing problems overwork the heart and cause it to enlarge. This defect is often associated with Down syndrome. If left untreated, atrioventricular canal defect may cause heart failure and high blood pressure in the lungs. To fix this defect, doctors often recommend surgery during the first year of life to close the hole and reconstruct the valves.
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For more information, see: Mayo Clinic | Wikipedia
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