CardiAid External Chest Compression (ECC) Assistant is designed to help the rescuer perform the most effective and consistent chest compressions on a sudden cardiac arrest victim. Sudden cardiac arrest (SCA) is the situation in which the heart stops pumping the blood to the brain and the rest of the body. SCA can strike any person of any age and gender, anywhere, anytime. Heart attack, respiratory arrest, excessive physical activity, electrocution, drowning, stress are the main causes leading to SCA; especially at work places where the most of daily lifetime is spent.