Keith Seinfeld

Your chances of surviving a sudden heart attack may depend on where you live; some American cities have survival rates five times higher than others. One difference can be 911 dispatchers.

If they coach someone over the phone to give CPR, the chance of surviving goes up. There's now a push to make it universal, but some cities are slow to implement the necessary training.

Becky Cole was eight months pregnant with her fourth child when she collapsed against the bathroom door. It was January 2011 in the Seattle suburb of Woodinville.