Abstract
Internal Thoracic Artery (ITA) has been universally accepted as a superior conduit for patients undergoing coronary artery bypass operations. Hence, ITA harvest must be done with utmost care. All the branches of ITA must be clipped to ensure a long term patency. Sometimes, one encounters an ITA densely adherent to the overlying periosteum often prompting the surgeon to leave behind unclipped branches. The surgeon must be aware that there is a 15 % incidence of lateral costal branch in internal thoracic arteries [1], which can sometimes be overlooked. Coronary angiogram in a symptomatic patient, who underwent coronary artery bypass grafting 2 years ago, showed a prominent unclipped lateral costal branch from Left Internal Thoracic Artery (LITA) and string sign of LITA (Fig. 1). This case demonstrates the importance of complete harvest and clipping of all the branches of LITA for its patency.
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