The evidence is indisputable: high-quality CPR is the primary component in influencing survival from cardiac arrest.1 Not every patient will need a defibrillating shock, but every patient will need CPR. ZOLL introduced Real CPR Help® in 2002, and it’s standard on every AED (automated external defibrillator) and professional defibrillator ZOLL sells. Even for seasoned health care professionals, it’s hard to know if you are pushing hard enough and fast enough to meet current Guidelines for compression rate and depth. With Real CPR Help, you know. It provides audio and visual feedback that guides rescuers to deliver high-quality CPR.