attack - a sudden occurrence of an uncontrollable condition; "an attack of diarrhea"

ischaemic stroke, ischemic stroke - the most common kind of stroke; caused by an interruption in the flow of blood to the brain (as from a clot blocking a blood vessel)

haemorrhagic stroke, hemorrhagic stroke - stroke caused by the rupture of a blood vessel in the brain

cerebral hemorrhage - bleeding from a ruptured blood vessel in the brain