A man clutches his chest in a shopping mall, the crushing pain unmistakable. Within minutes, paramedics arrive, ECG leads applied, the diagnosis transmitted to the hospital. The cardiac catheterization lab team is mobilized before the ambulance arrives. Time is muscle - every minute of blocked coronary artery kills more heart tissue. The stent that opens his artery will happen within the golden hour. He will likely survive. A woman notices shortness of breath climbing stairs, dismissing it as aging or weight gain. Months later, heart failure is diagnosed, the damage already significant.