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This is Dr. Bonilla, experienced in Internal Medicine, Pulmonary and Critical Care.
I understand your concerns. Carotid stenosis can be treated by surgery. The main goal for surgery is prevention of stroke. It's important to consider the surgical risk, life expectancy and quality of life. It is reasonable to perform surgery when there is more than 70% stenosis of the internal carotid artery if the risk of perioperative stroke, infarct and death is low. All of these factors can be determine by the physician treating your wife. Let me know if you have any other questions. Please rate my answer.
I am an expert in carotid artery disorder and treatment. I am happy to help you. The window for treatment is NOT close. I need more information to provide you with best answer.
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Let me know if you have any further questions. If this answers your question, please complete the rating above. Best wishes