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Effect of orbital atherectomy in calcified coronary artery lesions as assessed by optical coherence tomography


By Jonathan Scheiner, Research Assistant

With significant contribution from St. Francis Hospital researchers, a new publication in Catheter and Cardiovascular Interventions (2019) has highlighted the role of coronary orbital atherectomy system as a highly effective treatment for patients with calcium deposits in coronary arteries. Orbital atherectomy system uses a diamond-coated crown to sand away calcium, and its area of effect is controllable by rotation speed up to 80,000 RPM, allowing for its use in different coronary artery vessels with differing degrees of calcification. In this study, coronary artery target vessels were assessed via intracoronary OCT (optical coherence tomography) before and after treatment with orbital atherectomy. Coronary artery vessels treated with orbital atherectomy were found to retain significantly less calcium deposits, better vessel size and blood flow, and improved stent placement, even in heavily calcified vessels. With advancements in adaptability and safety, orbital atherectomy has been shown achieve better angiographic outcome.