Anomalous coronary arteries may course in close proximity to the mitral annulus, which increases the risk of iatrogenic occlusion due to annular suture placement. We report a mitral valve repair in a 55-year-old male with severe mitral regurgitation and an anomalous retro-aortic left coronary artery, originating from the right coronary sinus, coursing in close proximity to the anterior mitral annulus. To minimize iatrogenic occlusion risk an open annuloplasty ring was used with good long-term results.
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