Joe Garcia laid flowers at the grave of his wife, slain Robb Elementary School teacher Irma Garcia. Then, the grieving Uvalde, Texas, widower went home and died of a heart attack. His family says he died of a broken heart. But is that an actual medical condition? According to Dr. Devi Nampiaparampil, the heart actually can actually change shape during stressful periods, thanks to stress hormones like adrenaline.