The number of patients who suffer from sudden cardiac arrest increases year after year, but fewer than 1 out 10 of those patients undergoes CPR. If a person receives CPR within six minutes of a cardiac arrest, the chance of survival increases three-fold. But if done inaccurately, it puts the patient in jeopardy. Heart Vest is an auxiliary CPR device that ensures everyone can perform CPR easily and accurately, even without training. Sensors and lighting on the vest intuitively guide the user through administering CPR.