Former Democratic Unionist Party leader and First Minister Ian Paisley has had a pacemaker fitted after he became ill at a House of Lords meeting on Wednesday night.
The peer, aged 84, who is now Lord Bannside, was initially treated by parliamentary paramedics then at St Thomas' Hospital in London.
His son, North Antrim MP Ian Paisley Junior, said doctors were exemplary and the pacemaker was put in place.
"It was very successful, he had it fitted and was discharged on Friday," he said.
He was at home at the weekend and is now back at work.