If you don’t know how to perform CPR, watch this

03:36 - Source: CNN
If you don't know how to perform CPR, watch this
About 70% to 90% of people who go into cardiac arrest in the US die before they get to a hospital because the people around them don't always know how to help. CNN's Dr. Tara Narula demonstrates some simple steps you can take right away if you suspect that someone has gone into cardiac arrest.