Former U.S. Vice President Dick Cheney has been hospitalized with chest pains.
Cheney was reported to be resting comfortably in a Washington hospital late Monday.
Cheney has a long history of heart problems, starting with a heart attack in 1978, when he was 37 years old. He had subsequent attacks in 1984 and 1988 before undergoing quadruple bypass surgery to clear his arteries. He had a pacemaker implanted in 2001 to regulate his heartbeat, and in 2008 he was treated for an abnormal rhythm in his heartbeat.
Cheney served as vice president for eight years during former President George W. Bush's two terms in office. Since his term expired in January 2009, he has spoken out on public issues frequently, and usually is seen as sharply critical of President Barack Obama.
Cheney also was a White House adviser or held other senior positions during the administrations of former Republican presidents George H.W. Bush, Gerald Ford and Richard Nixon.
