Dear Dr. Donohue: I am a 66-year-old man who thought he was in good shape except for a touch of high blood pressure. About a week ago, I suddenly noticed that my left arm and left leg had gone limp. I ...

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A stroke occurs when blood flow to the brain is interrupted or blocked. A lacunar stroke is a type of ischemic stroke that occurs when blood flow to one of the small arteries deep within the brain ...