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Infarction – A region of the brain which has died due to lack of blood flow (aka ischemia). This is the most common cause of stroke.

Intracerebral Hemorrhage – Bleeding into the substance of the brain itself results in a blood clot or “intracerebral hemorrhage.” “Intra” means within, “cerebral” means brain, and “hemorrhage” means bleeding. This can result from bleeding within the brain from any cause, including vascular malformations (such as AVMs or cavernous malformations), strokes and high blood pressure.

Intraventricular Hemorrhage – Bleeding into the fluid-filled cavities in the center of the brain known as ventricles. Blood within the ventricles can impair the brain’s ability to absorb the fluid normally. If the fluid builds up, this is known as hydrocephalus (water on the brain).