"The operation was successful. He is out of ICU now. He is recovering," a family member of the 70-year-old LJP chief told PTI.
The minister has been operated upon to fix a leaky heart valve by fitting a device.
His health condition is good and will be staying in London till June 14, the family member said.
Paswan had undergone a heart surgery earlier too.
He is on leave till June 14. In his absence, the additional charge of his ministry has been given to Agriculture Minister Radha Mohan Singh.