WASHINGTON (CNN) -- Vice President Dick Cheney was taken to George Washington University Medical Center on Tuesday after suffering from discomfort in the same leg where a blood clot was found earlier this month, officials from his office said.

Cheney spokeswoman Megan McGinn first told reporters that the vice president was merely meeting with his doctor at the medical center for a routine follow-up visit regarding the blood clot that was found in his lower left leg March 5.

But she later said that Cheney did have some discomfort earlier this morning and, after consulting with his physicians, he went to the medical facility for another ultrasound on the clot.

That imaging revealed no extension or complication from the blood clot, McGinn said.

Cheney first complained of discomfort in his leg after an overseas flight in early March. Doctors performed an ultrasound at that time and found a deep venous thrombosis, or DVT, in his lower left leg, she said.

He was put on blood-thinning medication and returned to work soon after.

Cheney has had a history of heart ailments -- including four heart attacks dating back to 1978 -- and was briefly hospitalized in January 2006 after suffering shortness of breath. In September 2005, he underwent surgery to remove an aneurysm in an artery behind his right knee.