Christina Costanzo was 32 when she had her first heart attack. It all started on a Friday.
"I had chest pain. I had pain in my jaw, pain going down my left arm. I had some shortness of breath," Costanzo recalls.
But Costanzo who is a nurse practitioner in New Haven, Conn., didn't realize right away that these were symptoms of a heart attack. She figured this was just her body reacting to stress, and she didn't want to overreact.