title: The Glider registry.
abstract: BACKGROUND
  Provisional stenting of the side-branch (SB) is the universally accepted gold standard while there is still controversy on the usefulness of routine dilatation of the SB ostium. Recrossing the struts of a previously deployed stent with a wire and a balloon can prove challenging and is occasionally unsuccessful, mainly because the balloon tip hits a stent strut. This prospective multicenter international registry tested the crossing ability procedural results of a new-dedicated ultrashort balloon specifically designed for side branch dilatation (Glider, TriReme Medical, Pleasanton, CA, USA).
  
  
  METHODS
  One hundred and twenty five patients (for a total of 131 bifurcation lesions) were enrolled in the registry between January 2009 and May 2012. The Glider was used as first choice in alternative to conventional balloon (group I, 72%) or as bail-out after unsuccessful previous attempt at crossing with small conventional low-profile balloons (group II, 28%). Postprocedural coronary artery dissections and in-hospital MACE (death, myocardial infarction and repeat revascularization) were assessed. Technical success was defined as the ability of the Glider to recross the struts of a previously deployed stent while procedural success was defined as less of residual 50% diameter stenosis at the origin of the SB with a final TIMI 3 and/or freedom from in-hospital MACE.
  
  
  RESULTS
  Technical success was achieved, respectively, in 92% (group I), and 83% (group II). Clinical and angiographic procedural success was achieved in 98% of the lesions. In Group II, no other balloon of the same size could cross in cases where Glider could not. A total of 13 complications were observed, including nine ostial SB dissection four of which needed a second stent on the SB, one stent loss, two severe coronary spasms, and two by thrombus formation.
  
  
  CONCLUSIONS
  The unique possibility offered by this short dedicated balloon to orientate its beveled tip provides an effective strategy for recrossing stent struts when conventional low profile balloons fail achieving greater SB ostial expansion thus reducing the incidence of strut malapposition during provisional treatment of bifurcational lesions. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Clinical and Experimental Medicine, University of Eastern Piedmont, Novara, Italy.
authors.forename: Gioel Gabrio
authors.initials: GG
authors.lastname: Secco
authors.affiliation: Medizinische Klinik 2, Universitätsklinikum Erlangen, Erlangen, Germany.
authors.forename: Harald
authors.initials: H
authors.lastname: Rittger
authors.affiliation: Vivantes Klinikum Am Urban, Berlin, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Hoffmann
authors.affiliation: Department of Cardiology, Heart Center, Segeberger Kliniken GmbH, Bad Segeberg, Germany.
authors.forename: Gert
authors.initials: G
authors.lastname: Richardt
authors.affiliation: Department of Cardiology, Heart Center, Segeberger Kliniken GmbH, Bad Segeberg, Germany.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdel-Wahab
authors.affiliation: Department of Cardiology and Angiology, University Hospital Münster, Münster, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Reinecke
authors.affiliation: Hadassah-Hebrew University Medical Center, Jerusalem, Israel.
authors.forename: Chaim
authors.initials: C
authors.lastname: Lotan
authors.affiliation: Klinikum Darmstadt, Darmstadt, Germany.
authors.forename: Gerald
authors.initials: G
authors.lastname: Werner
authors.affiliation: Cardiovascular Center Frankfurt, Frankfurt, Germany.
authors.forename: Horst
authors.initials: H
authors.lastname: Sievert
authors.affiliation: Department of Bioengineering, Imperial College London, London, United Kingdom.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Foin
authors.affiliation: Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust, London, United Kingdom.
authors.forename: Carlo
authors.initials: C
authors.lastname: Di Mario
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000295:instrumentation* / Q000401:mortality; D062906:Cardiac Catheters; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D003328:Coronary Thrombosis / Q000209:etiology; D003329:Coronary Vasospasm / Q000209:etiology; D005260:Female; D005858:Germany; D006801:Humans; D007557:Israel; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D011446:Prospective Studies; D011474:Prosthesis Design; D012042:Registries; D012307:Risk Factors; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome; D006113:United Kingdom; D055114:X-Ray Microtomography
keywords: bifurcation; drug eluting stents; kissing balloon