U.S. Vice President Dick Cheney was taken to hospital complaining of shortness of breath on Monday but was released about four hours later, his office said, according to Reuters. "The vice president has departed the hospital. He is home," said Jenny Mayfield, a spokeswoman for his office. The vice president, who has had four heart attacks, was taken to George Washington University Hospital around 3 a.m. (0800 GMT), according to a statement issued by his office. Doctors administered an EKG, a test that monitors the electrical activity of the heart, and "found that it was unchanged," the statement said. Doctors "determined that (Cheney) was retaining fluid as a result of anti-inflammatory medication he has been taking for a foot problem. (The doctors) have placed him on a diuretic and he is expected to return home later today," the statement said.