WASHINGTON — Attorney General Eric Holder was hospitalized for several hours Thursday and treated for an elevated heart rate after experiencing lightheadedness and shortness of breath, the Justice Department said.Holder arrived as a precaution at a Washington hospital around 10:30 a.m. and was given medicine to restore his heart rate to a normal level. He was discharged less than three hours later after completing a series of tests. He walked out of the hospital on his own and was sent home to rest Thursday afternoon, according to a Justice Department statement that described him as "alert and in good spirits." A heart attack was ruled out.The Justice Department said Holder experienced similar symptoms several years ago, but the symptoms were milder then and did not require serious medical attention.Holder, a trim 63-year-old, is known inside the department for bypassing the elevator and taking the stairs at a brisk pace to reach his fifth-floor office. He also plays basketball.The White House says President Barack Obama was notified and wished Holder a "speedy recovery."