The Leeds Hospitals NHS Trust they have taken the decision to temporarily pause children's congenital cardiac surgery and associated interventions while a review is conducted, a process they aim to complete in around three weeks.
The Care Quality Commission says it supports the decision.
"We support the Trust's decision to carry out a review of their children's heart surgery unit and to put existing activity on hold pending the outcome of the review. We are in close contact with the trust to ensure effective arrangments are in place to protect the safety and welfare of patients during the period of of the review. We are monitoring the situation extremely closely and will not hesitate to take regulatory action if we believe this is required."
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".