Strangers saved a 28-year-old woman’s life when her heart suddenly stopped beating in the middle of a cross-country flight this month. Now she and the doctor who jumped to her aid are urging ...

But only a defibrillator can restart the heart. Nationwide, portable defibrillators have saved lives in airplanes, shopping malls and casinos. Closer to home, there are about 200 of the devices in ...