Foreign Minister George Vella will undergo surgery at Mater Dei Hospital tomorrow, the ministry said.
He will be admitted to hospital this afternoon for a cardiac bypass.
The ministry said Dr Vella suffered a slight cardiac arrest while on a recent visit to China. He was treated in a Beijing hospital where two stents were introduced.
When he returned to Malta, local consultants advised him to have the bypass.
The PN in a statement wished Dr Vella well.