Chances of surviving a sudden cardiac arrest are significantly higher if a school is prepared with a response plan and devices known as AEDs. But data show many schools aren't as prepared as they could be.

Across the country, millions watched in shock as NFL’s Damar Hamlin went into sudden cardiac arrest on live TV earlier this year. His life was saved. And many credit that to a quick response plan and a machine called an AED. Indiana lawmakers are considering legislation to require AEDs in schools, but mandating these devices is a complicated decision.