Abdominal Aortic Branch Occlusion By Mark A Farber, MD, FACS, University of North Carolina; Federico E Parodi, MD, University of North Carolina School of Medicine Reviewed / Revised Jun 2022 | Modified Sep 2022 View Patient Education Symptoms and Signs Diagnosis Treatment Key Points Various branches of the aorta can be occluded by atherosclerosis, fibromuscular dysplasia, or other conditions, causing symptoms and signs of ischemia or infarction.