In a single center with experienced operators, the use of the Guidezilla guide extension catheter in PCI of complex coronary anatomy performed mostly via radial artery access appeared safe and efficacious, and greatly facilitated device delivery.Ĭomplex coronary anatomy including extreme vessel tortuosity, chronic total occlusions (CTOs), or calcification often renders percutaneous coronary intervention (PCI) challenging and time consuming, with procedural success warranting excellent device support via larger size guiding catheters, buddy wires, strong-support wires, anchoring balloons, and deep insertion of the guiding catheter commonly using a mother-child catheter. Ninety percent of PCI were performed and completed successfully by radial access. Rates of target lesion crossing success and procedural success were both 99%, with one device-related periprocedural complication, namely proximal vessel dissection secondary to deep insertion which was successfully treated with stent implantation. The right coronary artery (48%) was most commonly intervened followed by the left ascending (35%) and left circumflex (17%) arteries. The Guidezilla catheter was used most commonly in PCI of CTOs (45%) and heavy proximal calcification (37%), followed by tortuosity (10%), previously deployed proximal stents (4%), and coronary artery anomaly (4%). Study outcomes were rates of target lesion crossing success, procedural success, and complications. The present retrospective, single-center study included 188 consecutive patients who underwent PCI using the Guidezilla catheter from March 2015 to August 2016. The monorail Guidezilla TM guide extension catheter was designed to provide additional backup and facilitate device delivery in percutaneous coronary intervention (PCI) for complex coronary anatomy such as chronic total occlusion (CTO), extreme vessel tortuosity, diseased bypass grafts, and anomalous coronary arteries, among others.
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