To add to other posts: Stroke occurs when the brain is starved for oxygen (via blood). This can happen if the blood stops flowing (your arteries are blocked) or the blood is leaking out (in the case of a burst aneurysm)
Thus, aneurysms can lead to strokes, but not all strokes are due to aneurysms. Also, aneurysms can happen anywhere in the body there is a blood vessel.
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