He was dead. His face a terrifying, sweat-slicked white, the young man’s body lolled lifelessly on the emergency room gurney. Five hours earlier, Marty had walked in a strong, healthy 27-year-old. His only worry: some sharp pains in the left side of his chest that started two days earlier. He figured it might be a muscle pull from weightlifting. But then it spread. “Any shortness of breath?” I asked. “No.” “Pain down your arm?” “Just the ...