title: [Oval echo-free space at the atrioventricular sulcus].
authors.affiliation: Second Department of Internal Medicine/Cardiovascular Center, Kansai Medical University, Osaka.
authors.forename: H
authors.initials: H
authors.lastname: Koito
authors.forename: T
authors.initials: T
authors.lastname: Iwasaka
mesh_terms: D004452:Echocardiography; D006322:Heart Aneurysm / Q000000981:diagnostic imaging*; D006801:Humans; D008067:Lipoma / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged