Freedom, R M The natural history of the so-called aneurysm of the membranous ventricular septum in childhood. [electronic resource] - Circulation Feb 1974 - 375-84 p. digital Publication Type: Journal Article ISSN: 0009-7322 Standard No.: 10.1161/01.cir.49.2.375 doi Subjects--Topical Terms: AngiocardiographyCardiac CatheterizationElectrocardiographyHeart Aneurysm--diagnostic imagingHeart Defects, Congenital--diagnostic imagingHeart Septal Defects, Ventricular--classificationHumansPhonocardiography