The vice-president of the US Mr Dick Cheney told reporters outside a Washington hospital that he felt fine after having been admitted suffering from breathlessness.
Mr Cheney (63), who has a history of heart attacks, has had a cold and aides said his cardiologist, Dr Jonathan Reiner, advised him to visit George Washington University Hospital out of an abundance of caution.
Dr Reiner later issued a statement ruling out "any cardiac cause" of Mr Cheney's symptoms and also ruled out pneumonia and lung problems.
"The vice president likely has a viral, upper respiratory infection," Dr Reiner said in a statement. Walking toward his motorcade as he departed the hospital, Mr Cheney told reporters, "I feel fine."
With Cheney was his wife, Lynne, who said, "Sorry we ruined your Saturday. We're great. Thank you."
Mr Cheney first heart attack was in 1978 when he was 37 but none while he has been vice-president. The most recent was a mild one shortly after the contested presidential race in November 2000.
The vice president had a stent - a permanent wire mesh tube - implanted to open an artery after his last heart attack. A defibrillator, to help regulate his heartbeat, was implanted in 2001.
Mr Cheney's spokeswoman Ms Mary Matalin said the vice president had developed a cold after a post-election hunting trip from which he returned on Thursday night. He was well enough to go to work on Friday and participate in a full day of meetings during a visit to the White House by British Prime Minister Tony Blair.
But he had a "very fleeting" episode of shortness of breath which Dr Reiner wanted him to check out to be on the safe side, Matalin said.
He's Mr. Caution," Ms Matalin said of the cardiologist. Mr Cheney kept up a hectic travel schedule in recent months, stumping for Mr Bush's re-election campaign.