老年人的脑中风有3种可能性，
1. 80%的中风是由血栓堵塞血管造成的局部脑细胞缺血，引起中风 (只有脑血栓引起的中风可以用tPA 治疗。)
2， 20%的中风是由 脑血管破裂，血液侵入脑细胞，造成细胞受损， 坏死。
3， 血液淤积于血管某处，形成动脉瘤并压迫周边脑细胞导致脑细受损
神经细胞没有再生功能。 一旦有中风迹象，需要及时叫喊救护车送急诊。
Stroke is a medical emergency. Recognizing and responding immediately to the warning signs of stroke by calling 9-1-1 or your local emergency number can significantly improve survival and recovery. If a person is diagnosed with a stroke caused by a blood clot, doctors can administer a clot-busting drug available only at a hospital, and only within a few crucial hours after symptoms begin.* That’s why it is very important to be able to recognize the 5 warning signs of stroke and immediately call 9-1-1 or your local emergency number.
The five signsStroke can be treated. That's why it is so important to recognize and respond to the warning signs.
Weakness - Sudden loss of strength or sudden numbness in the face, arm or leg, even if temporary.
Trouble speaking - Sudden difficulty speaking or understanding or sudden confusion, even if temporary.
Vision problems - Sudden trouble with vision, even if temporary.
Headache - Sudden severe and unusual headache.
Dizziness - Sudden loss of balance, especially with any of the above signs.
If you experience any of these symptoms, CALL 9-1-1 or your local emergency number immediately.
*
Health Canada has approved the clot-busting drug called tPA to be used within 3 hours from the time symptoms begin. However, emerging science is now showing that tPA could be effective up to 4 ½ hours afterward. As a result, the Canadian Stroke Strategy has issued new Canadian Best Practices Recommendations for Stroke Care, which have included this new treatment time. Still, it will be up to the attending emergency doctors to determine when tPA may be administered or if it is appropriate to the situation.
心脏和中风基金会有非常全面的信息：
http://www.heartandstroke.com/site/c.ikIQLcMWJtE/b.3483933/k.CD67/Stroke.htm
