I've recently had an MRI and MRA. Both came up fine. However, I still suffer from Vertigo. My cholesteral wasn't good. My weight is 223 at 5' 2". I still feel like crap. It was discovered that I only have one artery going from the spine to the brain carrying 100% of the blood and was told to take an asperin daily as a blood thinner for the prevention of a stroke. What if any could this genital birth defect have on maybe causes of the vertigo.