Ever heard of SCA?

We read many stories in the papers and on the net about people who were unfortunate to die from a heart condition.I used to think,why can't peolpe be more careful and get regular chek ups.I was surprised when I came across this website that provides cardiac arrest information.Apparently,a Sudden Cardiac Arrest(SCA) can prove fatal if not treated within 6 minutes.Some time gap huh?Presented by St.Jude Medical,the site offers two videos that involve a qualified doctor explaining the heart anatomy and SCA in layman's terms.Check it out.