Every second counts in cardiac arrest, which can happen at any time. Each year, more than 350,000 out-of-hospital cardiac arrests occur in the United States. When a person has a cardiac arrest, survival depends on immediately receiving CPR. Unfortunately, about 90 percent of people who suffer out-of-hospital cardiac arrests die. CPR, especially if performed immediately, can double or triple a victim's chance of survival. Learn Hands-Only CPR and be the difference for someone you love.