All congenital heart surgery has been suspended at Leeds General Infirmary with immediate effect.
The suspension of both adult and children's surgery follows a number of claims made against the hospital, including some relating to patient welfare and fatality rates.
ITV News Correspondent Debi Edward reports:
Sir Bruce's decision was partly based on figures from the steering committee for the Central Cardiology Audit Database (CCAD), however the chairman of the committee has said that that data was 'not fit.'
The decision by The National Health Director Sir Bruce Keogh has met with vociferous opposition by the parents of patients and local MPs.
The closure of the ward comes just days after campaigners from Leeds won a High Court challenge over proposed changes to children's heart surgery services in England after a judge ruled that the consultation process leading to the NHS decision had been flawed.