Cardiopulmonary Resuscitation (CPR) and Automated External Defibrillators (AEDs) are key links in the chain of survival of sudden cardiac arrest (SCA). Some cardiac events are treatable with effective CPR alone. Others require a combination of effective CPR and the delivery a lifesaving shock by an AED. Either way, every minute counts. Typically, only about five percent of SCA victims survive. However, survival rates can increase up to 74%1 if CPR and a shock from an AED are provided within three minutes of collapse. Reducing response time by even one or two minutes from collapse to shock can mean the difference between death and survival.2 More than a simple AED, the HeartSine samaritan PAD 450P (SAM 450P) Automated External Defibrillator (AED) with integrated CPR Rate Advisor meets the needs of two key links in the chain of survival. Not only can the semi-automatic SAM 450P deliver a lifesaving shock, it provides real-time visual and verbal feedback to the rescuer on the rate of CPR compressions during an SCA resuscitation — effectively assisting the rescuer to perform CPR.