One in two first strokes is fatal. Recovery depends upon the severity of the stroke and rehabilitation. Scanning methods can establish the cause of a stroke and the extent of the damage. Thrombolytic drugs may be used to dissolve blood clots, and aspirin and anticoagulants to prevent further clots. Surgery may be needed to remove arterial obstructions. About half of those who survive a stroke recover to a greater or lesser degree. Those with disabilities may require physiotherapy, speech therapy, or occupational therapy.
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