from HSI:
Quick diagnosis of a stroke is essential. But this can be difficult because early signs are often subtle. If irregular behavior raises suspicions of a stroke, here's an easy four-step stroke test that can help you spot a problem:
1) Ask the suspected victim to smile
2) Ask him to repeat a simple sentence
3) Ask him to raise both arms
4) Ask him to stick out his tongue straight out
If any one of the four tests can't be completed, call 911 immediately and describe symptoms to the dispatcher.
Then be ready to move quickly. The quicker the better.
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