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.
1 The disease gets its name from the wispy, tangled appearance of the new blood vessels that emerge in the brain (as the body attempts to compensate for the inadequate blood supply). 2  Moyamoya disease is a progressive condition, meaning that symptoms worsen over time and the child's chances of suffering a stroke increases.