Hello! I have gone through your question carefully and understand your concern. Your symptoms may be caused by a narrowed vertebral artery ( the artery which supply your posterior brain with blood) or by an inner ear problem. From your past medical history, I understand that you have high risk for atherosclerosis and vessel narrowing. So a vertebral artery insufficiency is very probable to be the cause of your vertigo. I would recommend you to consult with your GP, have a physical examination and a Doppler ultrasound of the carotid and vertebral arteries to see the blood flow to the brain. A consult with the ENT specialist may be necessary to exclude inner ear causes of peripheral vertigo. Hope to have been helpful! Greetings! Dr. Aida