Coronary artery bypass grafting was performed successfully on a patient by anastomosing the left internal thoracic artery and its pericardiacophrenic branch to the obtuse marginal and the posterior descending coronary artery, respectively, to form a Y graft. Preoperative angiography of the internal thoracic artery had revealed the presence of an unusually large pericardiacophrenic branch almost the size of the main trunk, which allowed us to plan for bifurcated artery grafting.
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