Don’t worry — you’re just tired and out of sorts after having your baby. But the chest pain experienced by the woman you’re about to meet was much more than a difficult recovery. She had a heart attack when a rare and deadly condition stopped blood flow to her heart. The same thing happened to another woman. After sharing their stories on social networking sites they found more women with the same problem. That’s when they contacted Mayo Clinic to convince cardiologists to use the information they gathered on the internet to research this condition.