The ZOLL® AutoPulse® is a non-invasive, revolutionary support option for Sudden Cardiac Arrest (SCA) victims. Traditionally SCA victims require manual chest compression. However, manual compression, even if it is done well, provides only 30-40% of the normal flow of blood to the brain and 10-20% to the heart. The ZOLL® AutoPulse® is a cardiac support pump, non-invasive and revolutionary, which consistently pumps more blood than what is possible by human hands. The device is battery-operated and easy to use. It has LifeBand®, a load-distributing band that squeezes the chest to deliver high-quality compressions that are consistent and ensure an improved, steady blood flow. No-flow time is cut down to a minimum. The device performs like an "additional person", allowing rescuers to perform life-saving activities like moving or transporting the victim. The device does not require any manual adjustments. It automatically calculates the shape, size, and resistance of a patient's chest.