Former U.S. President Bill Clinton underwent a successful heart procedure on Thursday to open a blocked artery in his heart with two stents after he had experienced chest discomfort, his spokesman said.

Clinton, 63, had quadruple heart bypass surgery in 2004 to free up four blocked arteries and the latest incident comes after he has traveled twice to Haiti to help recovery efforts after a devastating earthquake there.

"Today, President Bill Clinton was admitted to the Columbia Campus of New York Presbyterian Hospital after feeling discomfort in his chest," Douglas Band, counselor to Clinton, said in a statement.

"Following a visit to his cardiologist, he underwent a procedure to place two stents in one of his coronary arteries. President Clinton is in good spirits, and will continue to focus on the work of his foundation and Haiti's relief and long-term recovery efforts," Band said.

Band also said: "President Clinton is in good spirits and will continue to focus on the work of his foundation and Haiti's relief and long-term recovery efforts."

Clinton's daughter, Chelsea Clinton, was with her father, according to spokeswoman Julie Goldberg.

His wife, Secretary of State Hillary Clinton, arrived in New York on Thursday night after leaving her weekly meeting at the White House with President Obama, a State Department official said.

Hillary Clinton's trip to the Middle East will be delayed until Saturday, a senior U.S. official said. She had been scheduled to depart Friday afternoon.