Ascending Aorta to Descending Aorta Bypass for Coarctation and Interupted Aortic Arch

Ascending-to-descending aortic bypass for interrupted aortic arch is an alternative surgical strategy used in selected cases where direct arch reconstruction is not feasible or carries prohibitive risk, particularly in complex reoperative or late-presenting congenital heart disease. In this technique, a prosthetic conduit - most commonly a Dacron graft - is anastomosed proximally to the ascending aorta and distally to the descending thoracic aorta, effectively re-establishing systemic continuity while bypassing the absent or severely hypoplastic arch segment. The procedure is typically performed through a median sternotomy with posterior pericardial or transdiaphragmatic exposure of the descending aorta. It can be done with or without cardiopulmonary bypass depending on anatomy and patient stability. This bypass strategy avoids extensive arch dissection, reduces circulatory arrest time, and may lower the risk of recurrent laryngeal nerve injury or spinal cord ischemia in high-risk cases, while providing durable systemic outflow in patients with interrupted aortic arch physiology.