Over our 100-year history, the American Heart Association has been fighting heart disease and stroke, and striving to save and improve lives. Each year, more than 350,000 EMS-assessed out-of-hospital cardiac arrests occur in the U.S. When a person has a cardiac arrest, survival depends on immediately receiving CPR from someone nearby. Stop by the American Heart Association booth to practice chest compressions and learn how you can join the Nation of Lifesavers.