Information About Atrioventricular Canal Defect

(also known as Endocardial Cushion Defect, Atrioventricular Septal Defect)

Atrioventricular canal defect is caused by a poorly formed central area of the heart. There is typically a large hole between the upper chambers of the heart and an additional hole between the lower chambers. Instead of two separate valves allowing flow into the heart, there is a large common valve, which may be malformed. Atrioventricular canal defect is often seen in patients with Down syndrome.

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