title: Patency of coronary side branches covered by an everolimus-eluting bioresorbable vascular scaffold: clinical outcomes and computed tomography scan follow-up.
abstract: OBJECTIVE
  The behaviour of side branches (SBs) covered by a bioresorbable vascular scaffold (BVS) is not well known. This study analysed the rate of side branch occlusion (SBO) immediately after BVS implantation, its clinical impact, predictors of SBO and the fate of such SBs at follow-up.
  
  
  RESULTS
  We assessed 140 patients with 346 jeopardised SBs divided into three groups: small (<1 mm, n=181), intermediate (1-2 mm, n=102) and large (>2 mm, n=63). SBO was defined as a TIMI flow 0 or 1. Computed tomography was scheduled at six months for patients with jailed SBs >1 mm. Immediate occlusion occurred in 31 (9%) SBs: 22 (12%) small, 8 (8%) intermediate and one (1.6%) large, while post-procedural SBO was 5.5%. In-hospital events included one thrombosis (0.7%) and eight non-Q-wave myocardial infarctions (6%). After 17±3 months, one patient died (0.7%) and six patients needed repeat revascularisation (4%). Re-evaluation showed no late SBO at 7±3 months. Predictors of SBO were: small SBs (OR 2.06, 95% CI: 1.08-4.63; p<0.05) and stenosis >50% at the origin (OR 17.22, 95% CI: 7.79-38.10; p<0.01).
  
  
  CONCLUSIONS
  The incidence of SBO and its clinical impact were low when SBs >1 mm were covered. These favourable results were maintained at midterm.
authors: Department of Cardiology, Reina Sofia Hospital, University of Córdoba (IMIBIC), Córdoba, Spain.
authors: Soledad
authors: S
authors: Ojeda
authors: Manuel
authors: M
authors: Pan
authors: Javier
authors: J
authors: Suárez de Lezo
authors: Pedro
authors: P
authors: Martín
authors: Francisco
authors: F
authors: Mazuelos
authors: Miguel
authors: M
authors: Romero
authors: José
authors: J
authors: Novoa
authors: Simona
authors: S
authors: Espejo
authors: José
authors: J
authors: Segura
authors: Carmen
authors: C
authors: Morenate
authors: Alfonso
authors: A
authors: Medina
authors: Jose
authors: J
authors: Suárez de Lezo
mesh_terms: D020341:Absorbable Implants; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000379:methods; D002317:Cardiovascular Agents / Q000627:therapeutic use*; D017023:Coronary Angiography / Q000379:methods; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging* / Q000628:therapy; D054855:Drug-Eluting Stents; D000068338:Everolimus / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000628:therapy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D002317:Cardiovascular Agents; D000068338:Everolimus