title: Supraannular aortic root enlargement in patients with small aortic annulus: efficacy and safety.
abstract: BACKGROUND
  To accommodate optimal sized aortic valve, our experiences with supraan-nular aortic root enlargement (SAE) in 20 patients with small aortic annulus have been described.
  
  
  METHODS
  From June 1981 to April 1996, aortic valve replacement with a St. Jude Medical (SJM) valve had been performed in 46 patients with aortic stenosis consecutively. After August 1993, we employed SAE in patients to insert 23 mm or larger aortic prostheses (SAE group, n = 20; control group, n = 26). Patients were followed-up for a period of 1.7 to 8.3 years.
  
  
  RESULTS
  There were no intra- or postoperative complications. The pressure gradient across the prosthesis was greater than 30 mmHg in 4 patients of the control group and in 1 patient of the SAE group. Only in nineteen patients (73%) of the control group, 23 mm or larger sized valves could be implanted by a conventional technique. By contrast, with SAE, 23 mm or larger sized SJM prostheses were possible to implant in 19 out of 20 patients (95%).
  
  
  CONCLUSIONS
  To avoid valve-patient mismatch, SAE of aortic root is safe and effective.
authors.affiliation: Department of Cardiovascular Surgery, Akita University School of Medicine, Akita.
authors.forename: Y
authors.initials: Y
authors.lastname: Shibata
authors.forename: T
authors.initials: T
authors.lastname: Abe
authors.forename: S
authors.initials: S
authors.lastname: Sekine
authors.forename: J
authors.initials: J
authors.lastname: Chanda
mesh_terms: D001021:Aortic Valve; D001024:Aortic Valve Stenosis / Q000503:physiopathology / Q000601:surgery*; D001672:Biocompatible Materials; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011474:Prosthesis Design; D012189:Retrospective Studies; D016277:Ventricular Function, Left; D017725:Ventricular Pressure
chemical_list: D001672:Biocompatible Materials