Former centre-left leader stable after brain haemorrhage
Bersani had 'tranquil night' in hospital07 January, 11:15
The hospital said an update will be given later on Tuesday on the politician's condition.
Doctors have said Bersani, who underwent surgery, is alert and did not suffer brain damage. Bersani failed to lead the centre-left Democratic Party (PD) to victory in last year's general election despite having a big lead in the polls beforehand after conducting a colourless campaign.
He failed in efforts to persuade the anti-establishment 5-Star Movement (M5S) to back a government led by him after the election and the PD had to settle for a left-right coalition headed by another of its members, Premier Enrico Letta.
Bersani quit as PD chief in April after internal revolts prevented the party from having two of the candidates he had chosen elected president. The 62-year-old has received messages of support from all sides of Italy's political spectrum, including M5S leader Beppe Grillo, who used to call him a "dead man talking".