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Definition: a fetal vessel connecting the left pulmonary artery with the descending aorta; in the first 2 months after birth, it normally changes into a fibrous cord, the ligamentum arteriosum; persistent postnatal patentcy is a correctable cardiovascular handicap.
Synonym(s): arterial canal, arterial duct, Botallo duct
Examples: glitazone, GI cocktail, etc.
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