I have had unexplained seizures for years. could an avm account for this?

Possibly: There are many causes for seizure and avm's are only one of these. Approximately 30% of patients with avm's present with seizures. It's not one of the more common causes. You should see your local neurologist for workup and evaluation. If that leaves you at a dead end, seek out an epileptologist- a seizure disorder specialist in neurology who can help you.