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A combination of defects
Some congenital heart conditions are the result of not one but several defects. For example, tetralogy of Fallot is a combination of four defects: a hole in the ventricular septum, a narrowed passage between the right ventricle and pulmonary artery, a shift in the connection of the aorta to the heart, and thickened muscle in the right ventricle.
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How the heart works |