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US Vice President Dick Cheney was taken to George Washington Hospital early Monday experiencing shortness of breath, a spokeswoman said.
Lea Anne McBride said that doctors found his EKG unchanged and determined he was retaining fluid because of medication he was taking because of a foot problem.
Cheney, who has a long history of heart problems and has a pacemaker in his chest, was placed on a diuretic.
McBride said the vice president was expected to be released from the hospital later Monday.
A foot ailment forced Cheney to use a cane on Friday.
McBride said the foot condition was not related to surgery last September to repair aneurysms behind both knees or the 64-year-old vice president's lengthy history of heart problems. He has had four heart attacks, quadruple bypass surgery, two artery-clearing angioplasties and an operation to implant a special pacemaker in his chest.