Total Aortic Arch Replacement in a Patient with a Patent Right Internal Thoracic Artery Graft Crossing between the Sternum and the Ascending Aortic Aneurysm

Shigeki Koizumi＊	Kenji Minakata＊	Hisashi Sakaguchi＊
Kentaro Watanabe＊	Tomohiro Nakata＊	Kazuhiro Yamasaki＊
Tadashi Ikeda＊	Ryuzo Sakata＊

（Department of Cardiovascular Surgery, Kyoto University Hospital＊, Kyoto, Japan）

We report a case of 76 year-old woman who had previously undergone coronary artery bypass grafting（CABG）with the right internal thoracic artery（RITA）bypassed to the left anterior descending artery. Six years after CABG, she developed acute type A aortic dissection, and she was medically treated because the false lumen was thrombosed and it was considered that surgical intervention would be high risk for the patent RITA graft crossing between the sternum and the ascending aorta. During follow-up, her aortic aneurysm enlarged to 57mm in diameter, and finally she was referred to our hospital for surgical intervention. In this case, preservation of the patent RITA graft was thought to be critical because the RITA graft was the only blood source for the left anterior descending artery. Prior to re-median sternotomy, we performed a right anterior minithoracotomy to make sufficient space between the sternum and the RITA graft, and then instituted peripheral cardiopulmonary bypass to decompress the heart. After re-sternotomy, we ensured minimum dissection of the RITA graft, and we successfully accomplished graft replacement of the ascending aorta to the aortic arch without injuring the patent RITA graft. In cases with a patent RITA graft and an ascending aortic aneurysm close to the sternum, our strategy is considered to be efficient for re-median sternotomy.

 

Jpn. J. Cardiovasc. Surg. 45:144-147（2016）

Keywords：coronary artery bypass grafting;internal thoracic artery;re-sternotomy;aortic surgery;graft design