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balloon atrial septostomyA procedure in which the formamen ovale—which communicates between the right and left atria in the foetus and normally closes shortly after birth—is expanded by a balloon to allow free mixing of blood. The procedure is performed in infants with (dextro-) transposition of the great arteries, a cyanotic congenital heart disease; it has also been used for pulmonary hypertension.
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[William Rashkind, U.S. surgeon and pediatric cardiologist; d. 1986]Balloon atrial septostomy.
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