Thank you for an interpretation I can understand. Understanding quiets the nerves.
Tortuous indicates abnormal twist or turns in the aorta. If significant there would be symptoms and signs due to stenosis such as an enlarged left ventrical. Mild atelectasis or fibrosis indicates a space defect in the lungs that is air or fibrosis (not serious. None of these conditions would be contraindicate exercise. The spine fracture and exercise is your doctor's call.