What is the average life expectancy for someone who has had carotid artery surgery for radiation induced cad? how risky is this surgery?

90% 5 year w/o recur: What does CAD (coronary artery disease) have to do with carotid arteries ??? If your talking about Head/Neck Radiation causing Carotid Artery Stenosis this usually fixed with a onlay venous patch graft with good success

Area of radiation?: Radiation to the neck may cause carotid disease within 5-10 years and should be followed with serial studies ultrasound. The lesions may be longer than normal and may be more amenable to stenting than surgery. Mediastinal radiation increases the risk of many types of cardiac disease both involving the arteries as well as the pericardium,valves,and conduction system and requires diligent followup