A HEART transplant for a five-month-year-old baby has been successfully carried out in Madrid.

The Gregorio Maranon Hospital carried out the operation, despite the donor and child having incompatible blood types.

Hospital spokesperson Dr Manuela Camino said the operation took four hours and little Carla is recovering well after putting on enough weight to ensure the operation was not life-threatening.

“From now on, babies less than a year old will only have to have sufficient weight in order to have a transplant operation,” said Camino.

Spain is the third European country to complete such a complicated operation, along with Britain and Germany.