title: Final results of the CAPAS trial.
abstract: BACKGROUND
  The Cutting Balloon (Interventional Technologies Inc) is a new-concept balloon that incorporates 3 to 4 blades to create sharp incisions on the luminal surface of the lesion during dilation without causing severe tearing injury to the vessel wall. It may reduce restenosis and improve clinical outcome.
  
  
  METHODS
  Two hundred forty-eight lesions were randomly assigned to Cutting Balloon angioplasty (CBA, 120 lesions) or conventional balloon angioplasty (PTCA, 128 lesions). Inclusion criteria were type B/C lesions (American College of Cardiology/American Heart Association classification) and reference diameter <3.0 mm by visual image on angiogram. Quantitative coronary angiography was performed before and after percutaneous coronary angioplasty and at 3-month follow-up. The primary end point was restenosis, defined as >/=50% diameter stenosis at follow-up. Clinical event rates at 1 year were assessed.
  
  
  RESULTS
  Baseline characteristics were similar. Reference diameter was small in both groups (2.16 vs 2.18 mm, CBA vs PTCA). Preprocedural percent diameter stenosis (%DS) was similar (69.8% vs 69.6%). However, postprocedural and follow-up %DS were lower (26.2% vs 28.9%, P =.072; 40.8% vs 47.5%, P =.011) in the CBA group. Restenosis was significantly lower (25.2% vs 41.5%, P =.009) in the CBA group. At 1 year, event-free survival was achieved in 72.8% of the CBA group and in 61.0% of the PTCA group (P =.047).
  
  
  CONCLUSIONS
  These findings suggest that CBA provides superior angiographic and clinical outcomes in comparison with PTCA in small coronary arteries.
authors.affiliation: Department of Cardiology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Izumi
authors.forename: E
authors.initials: E
authors.lastname: Tsuchikane
authors.forename: M
authors.initials: M
authors.lastname: Funamoto
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: S
authors.initials: S
authors.lastname: Sumitsuji
authors.forename: S
authors.initials: S
authors.lastname: Otsuji
authors.forename: M
authors.initials: M
authors.lastname: Sakurai
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: N
authors.initials: N
authors.lastname: Awata
mesh_terms: D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation* / Q000379:methods; D017225:Atherectomy, Coronary / Q000379:methods*; D003327:Coronary Disease / Q000601:surgery*; D006801:Humans; D007391:International Cooperation; D016896:Treatment Outcome