BackgroundProvisional 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).MethodsOne 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.ResultsTechnical 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.ConclusionThe 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.