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The internal thoracic artery and its branches after coronary artery anastomoses in pediatric patients
T Isomura1, K Hisatomi, A Hirano
1Second Department of Surgery, Kurume University Hospital, Fukuoka, Japan.
Insights
Internal thoracic artery grafts offer superior patency in pediatric coronary artery bypass grafting (CABG). Ligation of proximal branches is crucial for maintaining optimal graft patency long-term.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Vascular Biology
Background:
- The internal thoracic artery (ITA) is preferred for pediatric coronary artery bypass grafting (CABG) due to its excellent patency rates.
- Understanding ITA angiographic changes post-CABG is vital for optimizing surgical techniques.
Observation:
- Angiographic evaluation of ITA and its branches before and after ITA to left anterior descending artery bypass was performed.
- Early postoperative angiography showed ITA patency with enlarged thymic or pericardial branches.
- A postoperative exercise test indicated residual ischemia in some patients.
Findings:
- One-year postoperative angiograms revealed a grown ITA with the disappearance of previously enlarged side branches.
- Enlargement of proximal ITA branches in the early postoperative period may compromise long-term graft function.
Implications:
- Ligation of all proximal ITA branches is recommended to ensure sustained early and late graft patency.
- Optimizing ITA branch management can improve outcomes in pediatric CABG patients.
Abstract:
The internal thoracic artery has been favored because of its superior early and late patency for coronary artery bypass grafting (CABG) in pediatric patients. We have studied the angiographic changes of the internal thoracic artery and its side branches before and after CABG with internal thoracic artery to the left anterior descending artery. The internal thoracic artery with remaining thymic or pericardial branches was patent but showed enlargement of the branches in the early period after the operation, and a postoperative exercise test suggested a remaining ischemic lesion in the bypass. Angiogram taken 1 year after CABG demonstrated the grown internal thoracic artery with disappearance of most of the side branches, which had been enlarged 1 month after the operation. Our findings suggest the importance of ligation of the whole proximal internal thoracic artery branches to maintain good early and late patency.