Hugo Chávez won the presidential vote on Sunday, securing another six year term in office.
Chávez's socialist part, polled 54.66% compared to 44.73% for the opposition leader Henrique Capriles of the Movement for Democratic Unity (MUD).
Addressing cheering crowds from the balcony of Miraflores Palace, Chávez said people had "voted for socialism" and exclaimed, "the revolution has triumphed!"
Celebrating the victory, President Fernandez of Argentina tweeted: "Your victory is our victory! And the victory of South America and the Caribbean!"