title: Second-generation optical coherence tomography in clinical practice. High-speed data acquisition is highly reproducible in patients undergoing percutaneous coronary intervention.
abstract: OBJECTIVE
  The development of second-generation optical coherence tomography (i.e. Fourier domain optical coherence tomography, FD-OCT) has made it possible to perform high speed pullbacks during image acquisition without the need for transient occlusion of the coronary artery. The objective of this study was to assess the reproducibility of FD-OCT systems for characterizing plaque and evaluating stent implantation in patients undergoing a percutaneous coronary intervention.
  
  
  METHODS
  The study included 45 patients scheduled for percutaneous coronary intervention who were enrolled between May and December 2008. Image acquisition was performed by FD-OCT using a non-occlusive technique and employing pullback speeds ranging from 5 to 20 mm/s. Interstudy, interobserver and intraobserver reproducibility of plaque characterization and stent analysis were assessed.
  
  
  RESULTS
  Fourier domain imaging was successfully performed in all patients (n=45). The average flush rate was 3+/-0.4 mL/s and the contrast volume per pullback was 16.1+/-3.5 mL. The mean pullback duration and length were 3.2+/-1.2 s and 53.3+/-12.4 mm, respectively. The interstudy reproducibility for visualizing edge dissection, tissue prolapse, intrastent dissection and malapposition was excellent (k=1). The kappa values for interstudy, interobserver and intraobserver agreement on plaque characterization were 0.92, 0.82 and 0.95, respectively.
  
  
  CONCLUSIONS
  A second-generation OCT system (i.e. FD-OCT) involving high-speed data acquisition demonstrated good interstudy, interobserver and intraobserver reproducibility for characterizing plaque and evaluating stent implantation in patients undergoing a percutaneous coronary intervention.
authors.affiliation: Thoraxcenter, Erasmus MC, Rotterdam, Países Bajos.
authors.forename: Nieves
authors.initials: N
authors.lastname: Gonzalo
authors.forename: Guillermo J
authors.initials: GJ
authors.lastname: Tearney
authors.forename: Patrick W
authors.initials: PW
authors.lastname: Serruys
authors.forename: Gijs
authors.initials: G
authors.lastname: van Soest
authors.forename: Takayuki
authors.initials: T
authors.lastname: Okamura
authors.forename: Héctor M
authors.initials: HM
authors.lastname: García-García
authors.forename: Robert
authors.initials: R
authors.lastname: Jan van Geuns
authors.forename: Martin
authors.initials: M
authors.lastname: van der Ent
authors.forename: Jurgen
authors.initials: J
authors.lastname: Ligthart
authors.forename: Brett E
authors.initials: BE
authors.lastname: Bouma
authors.forename: Evelyn
authors.initials: E
authors.lastname: Regar
mesh_terms: D015906:Angioplasty, Balloon, Coronary; D003324:Coronary Artery Disease / Q000175:diagnosis* / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D015607:Stents; D013997:Time Factors; D041623:Tomography, Optical Coherence / Q000379:methods