Nine-year-old Dáithí Mac Gabhann was born with the rare hypoplastic left heart syndrome (HLHS) and had been on the waiting list for a heart transplant since 2018. AdvertisementHis father, Mairtin and the rest of his family campaigned for years for a move towards a soft opt-out law and to promote organ donation. “His wait, the longest of any child in the world for a heart transplant, is over. “Organ donation is the greatest gift anyone can ever give. “Please keep talking about organ donation.