title: Safety and efficacy of coronary stent implantation. Acute and six month outcomes of 1,126 consecutive patients treated in 1996 and 1997.
abstract: OBJECTIVE
  The authors analyzed the 30-day and 6-month outcomes of 1,126 consecutive patients who underwent coronary stent implantation in 1996 and 1997.
  
  
  METHODS
  The 30-day results and 6-month angiographic follow-up were analyzed in patients treated with coronary stents in 1996 and 1997. All patients underwent coronary stenting with high-pressure implantation (> 12 atm) and antiplatelet drug regimen (aspirin plus ticlopidine).
  
  
  RESULTS
  During the study period, 1,390 coronary stents were implanted in 1,200 vessels of 1,126 patients; 477 patients were treated in the year 1996 and 649 in 1997. The number of percutaneous procedures performed using stents increased significantly in 1997 compared to 1996 (64% vs 48%, p = 0.0001). The 30-day results were similar in both years: the success and stent thrombosis rates were equal (97% and 0.8%, respectively). The occurrence of new Q wave MI (1.3% vs 1.1%, 1996 vs 1997, p = NS), emergency coronary bypass surgery (1% vs 0.6%, 1996 vs 1997, p = NS) and 30-day death rates (0.2% vs 0.5%, 1996 vs 1997, p = NS) were similar. The 6-month restenosis rate was 25% in 1996 and 27% in 1997 (p = NS); the target vessel revascularization rate was 15% in 1996 and 16% in 1997 (p = NS).
  
  
  CONCLUSIONS
  Intracoronary stenting showed a high success rate and a low incidence of 30-day occurrence of new major coronary events in both periods, despite the greater angiographic complexity of the patients treated with in 1997. These adverse variables did not have a negative influence at the 6-month clinical and angiographic follow-up, with similar rates of restenosis and ischemia-driven target lesion revascularization rates.
authors.affiliation: Instituto Dante Pazzanese de Cardiologia, Säo Paulo, Brazil.
authors.forename: L A
authors.initials: LA
authors.lastname: Mattos
authors.forename: I
authors.initials: I
authors.lastname: Pinto
authors.forename: A
authors.initials: A
authors.lastname: Abizaid
authors.forename: A
authors.initials: A
authors.lastname: Abizaid
authors.forename: A
authors.initials: A
authors.lastname: Chaves
authors.forename: F
authors.initials: F
authors.lastname: Feres
authors.forename: G
authors.initials: G
authors.lastname: Maldonado
authors.forename: L
authors.initials: L
authors.lastname: Tanajura
authors.forename: M
authors.initials: M
authors.lastname: Centemero
authors.forename: A G
authors.initials: AG
authors.lastname: Sousa
authors.forename: J E
authors.initials: JE
authors.lastname: Sousa
mesh_terms: D000368:Aged; D001807:Blood Vessel Prosthesis / Q000009:adverse effects / Q000706:statistics & numerical data; D003327:Coronary Disease / Q000601:surgery*; D004869:Equipment Safety; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015607:Stents / Q000009:adverse effects / Q000706:statistics & numerical data; D013997:Time Factors; D016896:Treatment Outcome