The court added: “This time, the operation will not be an open heart operation. The king will be awake, and the operation will be performed via the groin with local anaesthesia.”
The surgery will be performed by the King’s doctor, Chief Physician Bjørn Bendz at the Cardiovascular and Lung Clinic at Rikshospitalet in Oslo.
Dr Bendz said: “His Majesty the King has undergone regular check-ups, and the report we have made recently has shown this intervention is necessary to improve the King’s breathing.
“Hundreds of this type of operations are performed every year at Rikshospitalet, and the Norwegian operators are very experienced.”