go get your hearts checked because babies just don't die. louis had a heart that beat irregul irregularly. >> although never confirmed in simon, the mayo clinic contributes 10% to 15% on unexplained infant deaths to the syndrome and health effects like it are causing deaths later in childhood, as well. >> at the time there were no organizations out there that were checking kids' hearts. we don't want another family to go through what we've been through. >> simon's fund provides free heart screenings for kids. >> over the past ten years we've screened about 12,000 students. approximately 1% discover some type of heart condition. >> i went to a screening and found i had a structural issue with my heart. >> the opportunity of drew having a heart screening allowed us to prevent an incident that