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

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

    Objectives We sought to assess plaque modification and stent expansion following orbital atherectomy (OA) for calcified lesions using optical coherence tomography (OCT). Background The efficacy of OA for treating calcified lesions is not well studied, especially using intravascular imaging in vivo. Methods OCT was performed preprocedure, post‐OA, and post‐stent ( n  = 58). Calcium modification after OA was defined as a round, concave, polished calcium surface. Calcium fracture was complete discontinuity of calcium. Results Comparing pre‐ vs post‐OA OCT ( n  = 29), calcium area was significantly decreased post‐OA (from 3.4 mm 2 [2.4–4.7] to 2 ...

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