Each year, more than 950,000 adult Americans die from cardiovascular disease, making it the No.1 cause of death in the United States. At least 250,000 Americans die of sudden cardiac arrest (SCA) before they reach the hospital. SCA strikes people of all ages and all degrees of illness. It usually strikes without warning. Many of these lives can be saved if the bystanders quickly phone 911 and begin CPR, and if trained responders provide defibrillation within minutes.
