Efficacy and Feasibility of the 3-Dimensional Wiring Technique for Chronic Total Occlusion Percutaneous Coronary Intervention: First Report of Outcomes of the 3-Dimensional Wiring Technique.

OBJECTIVES: This study sought to compare the procedural outcomes of percutaneous coronary intervention for chronic total occlusion between the periods before and after introduction of 3-dimensional (3D) wiring.

BACKGROUND: Previously, we reported a 3D wiring method by which the operator can construct real-time mental 3D images from 2 perpendicular angles of X-ray system monitor during percutaneous coronary intervention for chronic total occlusion.

METHODS: A total of 137 chronic total occlusion lesions that could not be passed by tapered soft wires in our hospital between 2012 and 2017 were retrospectively enrolled in the study.

RESULTS: Overall success rate was significantly higher in the 3D wiring group (n = 69) than the non-3D wiring group (n = 68) (98% vs. 90%, respectively; p = 0.027). In the primary antegrade cases, the first antegrade approach time was significantly shorter in the 3D wiring group than the non-3D wiring group (42 ± 29 vs. 30 ± 16 min, respectively; p = 0.01). In cases where the antegrade approach was continued throughout the procedure, the success rate was significantly higher in the 3D wiring group than the non-3D wiring group (100% vs. 89.2%, respectively; p = 0.033). Vessel perforation by the antegrade wire tended to be lower in the 3D wiring group than the non-3D wiring group (1% vs. 11%, respectively; p = 0.055).

CONCLUSIONS: 3D wiring enables accurate guidewire control, which improves the success rate of antegrade wiring and reduces the antegrade procedure time, resulting in improvement of the overall success rate.