All children's heart surgery at Leeds General Infirmary has been suspended with immediate effect.
The decision has been taken after discussions with the NHS Commissioning Board and the Care Quality Commission.
The suspension of both adult and children's surgery follows a number of claims, including some relating to patient outcomes.
Children's heart surgery is set to resume at Leeds General Infirmary after days of uncertainty over its future.
A health expert from the North East says an argument about the future of children's heart services in our region has wasted time and money.
The Children's Heart Federation says the interests of management at the LGI have been "put ahead of critically ill children".