Ex-Italian premier Silvio Berlusconi has been taken to hospital for scheduled tests after doctors discovered a small irregular heartbeat during an earlier appointment.
A spokeswoman for Mr Berlusconi's Forza Italia party said the 79-year-old billionaire businessman, who has had a pacemaker for years, had not suffered any sudden illness and felt fine.
Spokeswoman Deborah Bergamini said he was expected to stay in the San Raffaele clinic in Milan for a few days of tests.
Mr Berlusconi has been largely sidelined from politics since a 2013 tax fraud conviction.
He still heads his Forza Italia party, which along with other centre-right parties had a mediocre showing in weekend local elections.