1971 Volume 12 Issue 5 Pages 500-506
A case of patent ductus arteriosus in a 74-year-old female was presented, who was the oldest case reported in Japan. The ductus was funnelshaped, 15mm. in lenght, 9×6mm. in size at the aortic opening between calcified and atheromatous plaques and had a membranous substance at the pulmonary opening.