title: Severe aortic regurgitation resulting from a downward displacement of anterior aortic annulus and fibrous strands in the bicuspid aortic valve.
abstract: Aortic regurgitation is occasionally caused by fibrous strands and more rarely by downward displacement of the aortic annulus. The present report describes an 18-year-old man with aortic regurgitation resulting from an anterior-posterior type of bicuspid aortic valve with fibrous strands and downward displacement of the anterior aortic annulus. A pair of fibrous strands at the anterior cusp of the bicuspid valve lifted the free margin of the cusp, and the anterior cusp originated from the intraventricular septum. We considered that the aortic regurgitation was due to poor coaptation of the cusps because of these two conditions. After resection of the cusps and the strands, the aortic valve was replaced at the intra-annular position.
authors.affiliation: Department of Cardiovascular Surgery, Tachikawa Medical Center, 3-2-11 Kanda-machi, Nagaoka, Niigata, Japan.
authors.forename: Takehito
authors.initials: T
authors.lastname: Mishima
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sugimoto
authors.forename: Kenji
authors.initials: K
authors.lastname: Sakakibara
authors.forename: Akifumi
authors.initials: A
authors.lastname: Uehara
authors.forename: Shinpei
authors.initials: S
authors.lastname: Yoshii
mesh_terms: D000293:Adolescent; D001021:Aortic Valve / Q000002:abnormalities* / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D006330:Heart Defects, Congenital / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D012720:Severity of Illness Index; D016896:Treatment Outcome