Footage of children's heart surgery at Glenfield Hospital
Footage has shown a four-year-old undergoing surgery for a blocked artery at Glenfield Hospital in Leicester.
Mohammed, from Derby, is now at home and recovering well.
Children's heart surgery is due to stop at the unit following an announcement by NHS England.
MPs and campaigners have vowed to fight the decision.
NHS England said the unit is not dealing with enough cases, a point disputed by the hospital.