Welcome to the Migraine and Headaches Forum! This forum is for questions and support regarding migraine and headache issues such as: abdominal
migraines, headaches caused by allergies, cluster headaches,
headaches, headaches in children, migraine headaches, sinus headaches, tension headaches, visual disturbances.
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Yes an MRA will measure the blood flow in and around the brain and will help to diagnose if there is a blockade present.
High BP and high cholesterol are risk factors for stroke which occurs due to blockade of cerebral blood vessels. Since you have both the risk factors it is important to rule out vascular causes of the white matter changes.
If they find a blockade you will be put on anti platelet medications and advised to keep your BP and blood cholesterol within normal limits. Hope this helps!