"Our stroke expert, Sarah Song, MD, MPH, assistant professor of neurology at in Chicago, offers this valuable advice. Act FAST. Being able to recognize the signs of stroke will help you respond faster and get help sooner and may result in less disability, says Dr. Song. "Remember the acronym FAST: Face, Arm, Speech, Time," she says. "The face can droop on one side. The arm can be weak or numb. Speech can be garbled, slurred, or nonsensical. Time is of the essence." If you notice any of these symptoms in yourself or anyone else, call 911 and get to the hospital as quickly as possible. "Treatment for stroke is most effective for patients who arrive at the hospital within four and a half hours of the start of symptoms," says Dr. Song. Always call 911. "Some people think they should drive to the emergency department," says Dr. Song. But stroke units in hospitals across the country now work closely with first responders, she says. EMTs are trained to spot the signs of stroke and can connect patients with stroke doctors quickly to prevent long waits in waiting rooms and emergency triage. "Calling 911 is the single best way to get yourself or someone you love evaluated and treated for stroke," she says."