Greece's incoming finance minister Vassilis Rapanos has been rushed to hospital after a fainting spell, said a government official and a source at the bank where he is chairman.
"He felt dizzy and fainted and was taken to hospital where he was given fluids intravenously and will undergo checks," the banking source said.
A government official said he spoke to Rapanos on the phone after he was taken to hospital, where he was in the process of undergoing checks.
Rapanos, the chairman of Greece's biggest commercial bank National Bank of Greece, has been named finance minister in Prime Minister Antonis Samaras's cabinet and was due to be sworn in later today.
Fear surrounding the eurozone have left many business owners unsure of how it will impact on the economy and their livelihoods.
World leaders are piling on the pressure to encourage Europe to take ambitious steps to resolve its debt crisis.
David Cameron will tell delegates that world leaders need to tackle the 'five greatest threats facing the global economy'.