It gives a high-risk group the ability to notify their friends and family and practice what to do in event of a heart attack. My mom frequently stays with me,

It gives a high-risk group the ability to notify their friends and family and practice what to do in event of a heart attack. My mom frequently stays with me, but outside of "call 911" I don't really know what to do in teh event of a heart attack. Time lost is lives lost, so better preparation could quite literally save lives.