- Types:
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septal defect
a congenital abnormality in the septum between the left and right sides of the heart
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Fallot's syndrome, Fallot's tetralogy, tetralogy of Fallot
a congenital heart defect producing cyanosis; characterized by four symptoms: pulmonary stenosis and ventricular septal defect and malposition of the aorta over both ventricles and hypertrophy of the right ventricle
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atrial septal defect
an abnormal opening between the left and right atria of the heart
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ventricular septal defect
a common congenital heart defect; an abnormal opening in the septum dividing the ventricles allows blood to pass directly from the left to the right ventricle; large openings may cause congestive heart failure