Drew Calver’s heart involuntarily pinned him to the bedroom floor just minutes after he took out the trash. Calver, a 44-year-old high school history teacher, swim coach, and triathlete living with his family in Austin, Texas, was having a heart attack. His neighbor rushed him to St. David’s Medical Center. Emergency medicine physicians admitted him to the hospital’s cardiac unit, where physicians implanted four stents in one of his coronary arteries.