title: Five-year follow-up of valve replacement with the Jyros bileaflet mechanical valve.
abstract: Jyros bileaflet rotating valves were implanted as a clinical trial conducted in Japan, and the 5-year results were assessed. Nineteen patients underwent implantation of the valves: 14 in the mitral and 5 in the aortic position. The mean follow-up period was 65.4+/-15.7 months. There was 1 case of late death due to fatal arrhythmia and another case of cerebral thromboembolism (1.0% per patient year). All survivors were in New York Heart Association class I. On the early postoperative cinefluorography, 8 valves (42.1%) showed rotation of the leaflets. However, in the latest assessment 6 valves (33.3%) showed rotation, some valves had stopped rotation, and others had started to rotate during the follow-up period. The Jyros valve functions effectively, similar to other bileaflet valves. However, because the correlation between thromboembolism and the rotation mechanism is not clear, further follow-up of our patients and more implant studies are necessary to elucidate this issue.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Mie University School of Medicine, Tsu, Japan. k-onoda@clin.medic.mie-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Onoda
authors.forename: F
authors.initials: F
authors.lastname: Yasuda
authors.forename: T
authors.initials: T
authors.lastname: Komada
authors.forename: B
authors.initials: B
authors.lastname: Pagoada-Cruz
authors.forename: Y
authors.initials: Y
authors.lastname: Katayama
authors.forename: T
authors.initials: T
authors.lastname: Shimono
authors.forename: H
authors.initials: H
authors.lastname: Shimpo
authors.forename: I
authors.initials: I
authors.lastname: Yada
mesh_terms: D000328:Adult; D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use; D001021:Aortic Valve / Q000601:surgery*; D001241:Aspirin / Q000627:therapeutic use; D002423:Cause of Death; D002933:Cineradiography; D005260:Female; D005471:Fluoroscopy; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects; D006801:Humans; D020766:Intracranial Embolism / Q000209:etiology; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use; D011474:Prosthesis Design; D012399:Rotation; D015996:Survival Rate; D018879:Ventricular Premature Complexes / Q000209:etiology; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D000925:Anticoagulants; D010975:Platelet Aggregation Inhibitors; D014859:Warfarin; D001241:Aspirin