Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hemorrhagic Stroke ?
    ### Response:
    A stroke is a medical emergency. There are two types - ischemic and hemorrhagic. Hemorrhagic stroke is the less common type. It happens when a blood vessel breaks and bleeds into the brain. Within minutes, brain cells begin to die. Causes include a bleeding aneurysm, an arteriovenous malformation (AVM), or an artery wall that breaks open.
    