Berlusconi seen for stress-related

(ANSA) - Milan, December 7 - Silvio Berlusconi had heart tests Wednesday because of a slight arrhythmia, caused by recent stress, at Milan's San Raffaele Hospital, hospital sources said.
    Arrhythmia is a side effect that can affect 25% of people who have had an operation to replace a faulty aortic valve, as the former premier did in June, and is therefore not cause for concern, they said. Berlusconi, 80, has been under unusual stress campaigning for a No vote in Sunday's Constitutional reform referendum, which was defeated.