title: [Influence of the clinical presentation on immediate and long-term results after rotational atherectomy].
abstract: OBJECTIVE
  To analyse the influence of unstable coronary syndromes (UCS) in the early and late prognosis after rotational atherectomy (RA).
  
  
  METHODS
  We treated 236 patients with RA between Aug/1992 and May/1996. Patients were divided into two groups: A) stable coronary syndromes 120 (51%) patients; B) UCS: 116 (49%) patients.
  
  
  BACKGROUND
  1) procedure success (PS)--lesion success in all locations were RA use was attempted, without a major complication; 2) late coronary events (LCE)--angina, MI, additional revascularization or death.
  
  
  RESULTS
  There was a significant predominance of age > 70 (A = 14% x B = 24%, p = 0.03) in B and previous MI (A = 32% x B = 11%, p = 0.0001) in A. Other characteristics were similar in both groups, including complex lesions (type B2/C), which were observed in 77% A stenosis and 80% B lesions. PS was 95% in A and 92% in B (p = NS). In-hospital major complications were observed in 2.5% A and 4.3% B patients, (p = NS). One patient died in each group. A and B patients had similar time of follow-up. LCE occurred in 25% A and 39% B patients (p = 0.002). Recurrence of angina (36% x 23%; p = 0.01) and target lesion revascularization (29% x 18%; p = 0.03) were also more frequently required in B cases.
  
  
  CONCLUSIONS
  This study suggests that UCS (group A) does not implicate in worse acute results after RA. However, UCS patients present greater incidence of late coronary events, particularly recurrence of angina and target-lesion revascularization.
authors.affiliation: Instituto Dante Pazzanese de Cardiologia, São Paulo.
authors.forename: L F
authors.initials: LF
authors.lastname: Tanajura
authors.forename: A G
authors.initials: AG
authors.lastname: Sousa
authors.forename: F
authors.initials: F
authors.lastname: Feres
authors.forename: L A
authors.initials: LA
authors.lastname: Mattos
authors.forename: G L
authors.initials: GL
authors.lastname: Nunes
authors.forename: A
authors.initials: A
authors.lastname: Abizaid
authors.forename: I M
authors.initials: IM
authors.lastname: Pinto
authors.forename: M P
authors.initials: MP
authors.lastname: Centemero
authors.forename: A J
authors.initials: AJ
authors.lastname: Chaves
authors.forename: A C
authors.initials: AC
authors.lastname: Abizaid
authors.forename: J E
authors.initials: JE
authors.lastname: Sousa
mesh_terms: D000368:Aged; D017225:Atherectomy, Coronary / Q000379:methods*; D016009:Chi-Square Distribution; D017023:Coronary Angiography; D003327:Coronary Disease / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D012189:Retrospective Studies; D016896:Treatment Outcome