overdraft facility. A credit agreement made with a financial institution that permits an account holder to use or withdraw more than they have in their account, without exceeding a specified maximum negative balance.
Without treatment, moyamoya disease can be fatal. Left untreated, individuals with the disease will experience mental decline and multiple strokes due to the narrowing of the arteries. Related: 1  Learn the signs and symptoms of a stroke.
Moyamoya disease is characterized by a slowly progressive stenosis and obliteration of the large vessels at the base of the brain, affecting mainly the supraclinoid segment of the internal carotid artery and the initial portion of the anterior or middle cerebral arteries and the posterior cerebral arteries (1).