title: Validity of the J-CTO Score and the CL-Score for predicting successful CTO recanalization.
abstract: BACKGROUND
  Percutaneous coronary intervention (PCI) of total chronic coronary occlusion (CTO) still remains a major challenge in interventional cardiology. To predict the probability of a successful intervention different scoring systems are available. We analyzed in this study the validity of two scoring systems, the Japanese CTO score (J-CTO score) and the newly developed Clinical and Lesion-related score (CL Score).
  
  
  METHODS
  Between 2012 and 2015 we included 379 consecutive patients. They underwent PCI for at least one CTO. Antegrade and retrograde CTO techniques were applied. The retrograde approach was used only after failed antegrade intervention.
  
  
  RESULTS
  Patients undergoing CTO PCI were mainly men (84%). The overall procedural success rate was 84% (±0.4). The mean J-CTO score was 2.9 (±1.3) and the mean CL score was 4.3 (±1.7). The CL score predicted more precisely the interventional results than the J-CTO score.
  
  
  CONCLUSIONS
  Our study suggests that the previously presented CL score is superior to the J-CTO score in identifying CTO lesions with a likelihood for successful recanalization. Generally it appears to be a helpful tool for selecting patients and identifying the appropriate operator.
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany. Electronic address: jan-erik.guelker@helios-kliniken.de.
authors.forename: J E
authors.initials: JE
authors.lastname: Guelker
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Bansemir
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Ott
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Rock
authors.affiliation: Department of Angiology, Helios Clinic Krefeld, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Kroeger
authors.affiliation: Rheinisch-Westfälisches Institut für Wirtschaftsforschung, Essen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Guelker
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: H G
authors.initials: HG
authors.lastname: Klues
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: D I
authors.initials: DI
authors.lastname: Shin
authors.affiliation: Heartcentre Niederrhein, Department of Cardiology, Helios Clinic Krefeld, Germany; Institute for Heart and Circulation Research, University Cologne, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Bufe
mesh_terms: D002908:Chronic Disease; D017023:Coronary Angiography; D054059:Coronary Occlusion / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention / Q000379:methods*; D012042:Registries; D015203:Reproducibility of Results; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D012720:Severity of Illness Index
keywords: Chronic total occlusion; Coronary artery disease; Percutaneous coronary intervention; Scores