title: A case of aortic valve replacement with St. Jude Medical Regent valve (first implant in Japan).
abstract: The St. Jude Medical (SJM) Regent valve was developed as a new mechanical valve by improving the conventional SJM valve. The effective orifice area is wider than that of Hemodynamic Plus (HP) series. The efficacy of the new valve has been reported in Europe and the United States. On October 26, 2004, we first performed aortic valve replacement (AVR) with the SJM Regent valve for aortic valve stenosis in Japan. A 64-year-old female was admitted to our hospital with dyspnea on exertion. She was diagnosed with aortic valve stenosis. She underwent AVR with a 17 mm SJM Regent valve. According to the results of echocardiography conducted two months postoperatively, the peak pressure gradient of the prosthetic valve was 32.0 mmHg, the mean pressure gradient was 13.2 mmHg, and the effective orifice area index (EOAI) was 0.92 cm2/m2. Cinefluoroscopy showed the valve opening angle of 85 degrees indicating full opening. She was discharged 15 days after surgery without complications. As demonstrated by the present case, implantation of a 17 mm SJM Regent valve produced a satisfactory result reflected by lower pressure gradient and absence of patient-prosthetic mismatch. In the future, the new valve is expected to be the optimum mechanical valve for a narrow annulus.
authors.affiliation: Department of Cardiovascular Surgery, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Sezai
authors.forename: Motomi
authors.initials: M
authors.lastname: Shiono
authors.forename: Kenji
authors.initials: K
authors.lastname: Akiyama
authors.forename: Yukihiko
authors.initials: Y
authors.lastname: Orime
authors.forename: Mitsumasa
authors.initials: M
authors.lastname: Hata
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Iida
authors.forename: Isamu
authors.initials: I
authors.lastname: Yoshitake
authors.forename: Shinji
authors.initials: S
authors.lastname: Wakui
authors.forename: Makoto
authors.initials: M
authors.lastname: Taoka
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Umeda
authors.forename: Nanao
authors.initials: N
authors.lastname: Negishi
authors.forename: Yukiyasu
authors.initials: Y
authors.lastname: Sezai
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kasamaki
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000601:surgery*; D004452:Echocardiography; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design