Every three days, more Americans die from sudden cardiac arrest than the number who died in the 9-11 attacks. You can lessen this recurring loss by learning Continuous Chest Compression CPR, a hands-only CPR method that doubles a person’s chance of surviving cardiac arrest.It’s easy and does not require mouth-to-mouth contact, making it more likely bystanders will try to help, and it was developed at the University of Arizona College of Medicine.