<s>[INST] What are the two types of stroke?     [/INST] There are two types of stroke – ischemic and hemorrhagic.

Ischemic strokes are caused by a blockage of an artery from a blood clot or plaque. They can form elsewhere in the body, break free and travel to the brain (embolic strokes), or they can form in the arteries of the brain from a clot or plaque build-up (thrombotic strokes). About 88% of all strokes are ischemic.

Hemorrhagic strokes are caused by a burst blood vessel. They can occur inside the brain (intracerebral) or outside the brain (subarachnoid) in the space under the arachnoid membrane.  An aneurysm is a weakened area on an artery wall that can burst or can slowly leak blood into or outside of the brain. Source: LOWELL GENERAL HOSPITAL. Link: https://www.lowellgeneral.org/care-and-services/emergency-services/resources-and-education/frequently-asked-questions-about-stroke. Field: Neurology. Disease: Stroke </s>