Histologic studies on normal and persistent ductus arteriosus in the dog.


The process of anatomic closure of the ductus arteriosus was studied at the ultrastructural level in 15 normal beagles (age 0 hour to 13 days) and in 18 specimens from a strain of dogs with hereditary persistent ductus arteriosus (age 4 hours to 27 days). Normal ductal closure takes place from the pulmonary artery to the aortic end. It is accompanied by a… (More)


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