A medical alert tonight, it's estimated that more than 350,000 people die each year in the US from sudden cardiac arrest. Now a local doctor's telling us how we can avoid being just another victim.
They're called ejection fractions, or EF’s. They measure the strength of our heart.
Now doctors are using EF numbers to determine if heart patients are at risk of sudden cardiac arrest. The lower number we have, the more at risk we are.
Smith suggests we ask our doctors if we need to be tested.