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Close proximity of coronary bypass graft to the sternal midline. Axial (a, b) and sagittal CT reformats (c) of a 74-year-old man being evaluated for re-operative cardiothoracic surgery show a RIMA (right internal mammary artery) graft crossing the midline, lying directly under the sternum at the level of the 3rd sternal wire, making it at high risk of injury if median sternotomy is performed
