Lei Song1, Akiko Maehara2, Matthew T Finn3, Sanjog Kalra3, Jeffrey W Moses2, Manish A Parikh2, Ajay J Kirtane2, Michael B Collins3, Tamim M Nazif2, Khady N Fall3, Raja Hatem3, Ming Liao3, Tiffany Kim3, Philip Green3, Ziad A Ali2, Candido Batres3, Martin B Leon2, Gary S Mintz4, Dimitri Karmpaliotis5. 1. Department of Cardiology, Cardiovascular Research Foundation, New York, New York; Department of Cardiology, New York-Presbyterian Hospital/Columbia University Medical Center, New York, New York; Department of Cardiology, National Center for Cardiovascular Disease, China Peking Union Medical College, Fuwai Hospital, Beijing, China. 2. Department of Cardiology, Cardiovascular Research Foundation, New York, New York; Department of Cardiology, New York-Presbyterian Hospital/Columbia University Medical Center, New York, New York. 3. Department of Cardiology, New York-Presbyterian Hospital/Columbia University Medical Center, New York, New York. 4. Department of Cardiology, Cardiovascular Research Foundation, New York, New York. 5. Department of Cardiology, Cardiovascular Research Foundation, New York, New York; Department of Cardiology, New York-Presbyterian Hospital/Columbia University Medical Center, New York, New York. Electronic address: dk2787@columbia.edu.
Abstract
OBJECTIVES: Using intravascular ultrasound (IVUS), the authors compared outcomes by observed wire position (intraplaque vs. subintimal) achieved during successful chronic total occlusion (CTO) lesion treatment. BACKGROUND: Recent successes in CTO percutaneous coronary intervention (PCI) have used both intraluminal and subintimal wire tracking to improve procedural success. IVUS may be used to determine the course of wire tracking after crossing a CTO. METHODS: From March 2014 to March 2016, data were collected into a single-center database from 219 patients undergoing CTO PCI with concomitant IVUS imaging. IVUS-visualized wire tracking patterns were then retrospectively examined. Clinical outcomes with a composite in-hospital cardiovascular endpoint of all-cause death, periprocedural myocardial infarction, and in-hospital target lesion revascularization were analyzed along with IVUS-detected vascular injury. RESULTS: Of the 524 lesions assessed, 219 patients with successfully recanalized CTO lesions had adequate IVUS imaging and were included. Subintimal tracking was detected in 52.1% of overall cases (86.7% dissection re-entry, 27.9% wire escalation). Minimal stent area of the CTO segment and prevalence of significant edge dissection were similar in the 2 groups. In the subintimal tracking group, there was a higher rate of the composite endpoint, mostly driven by periprocedural myocardial infarction. Subintimal tracking was associated with significantly greater IVUS-detected vascular injury, angiographic dye staining/extravasation, and branch occlusion. CONCLUSIONS: IVUS-detected subintimal tracking is observed in approximately one-half of all successful CTO PCI cases and is associated with an expected higher, yet acceptable, event rate with no difference in minimal stent area or edge dissection among patients undergoing contemporary hybrid CTO PCI.
OBJECTIVES: Using intravascular ultrasound (IVUS), the authors compared outcomes by observed wire position (intraplaque vs. subintimal) achieved during successful chronic total occlusion (CTO) lesion treatment. BACKGROUND: Recent successes in CTO percutaneous coronary intervention (PCI) have used both intraluminal and subintimal wire tracking to improve procedural success. IVUS may be used to determine the course of wire tracking after crossing a CTO. METHODS: From March 2014 to March 2016, data were collected into a single-center database from 219 patients undergoing CTO PCI with concomitant IVUS imaging. IVUS-visualized wire tracking patterns were then retrospectively examined. Clinical outcomes with a composite in-hospital cardiovascular endpoint of all-cause death, periprocedural myocardial infarction, and in-hospital target lesion revascularization were analyzed along with IVUS-detected vascular injury. RESULTS: Of the 524 lesions assessed, 219 patients with successfully recanalized CTO lesions had adequate IVUS imaging and were included. Subintimal tracking was detected in 52.1% of overall cases (86.7% dissection re-entry, 27.9% wire escalation). Minimal stent area of the CTO segment and prevalence of significant edge dissection were similar in the 2 groups. In the subintimal tracking group, there was a higher rate of the composite endpoint, mostly driven by periprocedural myocardial infarction. Subintimal tracking was associated with significantly greater IVUS-detected vascular injury, angiographic dye staining/extravasation, and branch occlusion. CONCLUSIONS: IVUS-detected subintimal tracking is observed in approximately one-half of all successful CTO PCI cases and is associated with an expected higher, yet acceptable, event rate with no difference in minimal stent area or edge dissection among patients undergoing contemporary hybrid CTO PCI.
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