title: Quadricuspid aortic valve: report of three cases.
abstract: Quadricuspid aortic valve (QAV) is a very rare congenital malformation. We have encountered three patients with QAV, of whom one patient may be the eldest reported patient with this particular anatomical abnormality. In another of our patients, there was aortic regurgitation, aortic stenosis, and healed infective endocarditis, with adhesion of the tips of the cusps. In all three patients, the cusps were all of equal size. Until now, there has been very little documented evidence about the anatomical variations in QAV or its relationship with infective endocarditis. From the available literature, we conclude that the anatomical variations in patients with QAV are similar to those in patients with quadricuspid pulmonary valve, and infective endocarditis may not be an uncommon complication.
authors.affiliation: Department of Internal Medicine and Cardiology, Wakakusa Daiichi Hospital, 1-6, Wakakusa-cho, Higashi-osaka, 579-8056, Japan. teragaki@med.osaka-cu.ac.jp
authors.forename: Masakazu
authors.initials: M
authors.lastname: Teragaki
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Sakai
authors.forename: Koichiro
authors.initials: K
authors.lastname: Asawa
authors.forename: Ryo
authors.initials: R
authors.lastname: Matsumoto
authors.forename: Noriaki
authors.initials: N
authors.lastname: Kasayuki
authors.forename: Koji
authors.initials: K
authors.lastname: Nakayama
authors.forename: Shinichi
authors.initials: S
authors.lastname: Tanizawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Tanaka
authors.forename: Shigefumi
authors.initials: S
authors.lastname: Suehiro
authors.forename: Junichi
authors.initials: J
authors.lastname: Yoshikawa
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000002:abnormalities* / Q000601:surgery*; D005260:Female; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged