Christie, 48, walked into Somerset Medical Center about 10:30 a.m. and was working from there yesterday afternoon, said Maria Comella, his deputy chief of staff. Christie's EKG, blood work and chest X-ray were normal, and the governor was discharged from the hospital last night, Comella said.
In a post on Facebook, Christie's brother Todd described the problem as an asthma attack.
The last time Christie sought emergency treatment for asthma, he was in law school, Drewniak said.
His wife, Mary Pat, was at the hospital but left after a few hours. Lt. Gov. Kim Guadagno was in her office at the Statehouse.
Christie canceled his monthly "Ask the Governor" radio show scheduled for last night.
"All breathing problems should be considered a medical emergency until proven otherwise," said Mark Rosenberg, who heads the emergency-medicine department at St. Joseph's Regional Medical Center in Paterson, N.J., and is not involved in Christie's care.
Christie has been open about some of his health problems.
He has long struggled with his weight, which he said he started putting on after high school when he stopped playing organized sports. He's tried dozens of diets over the years with varying success and has shed some pounds in recent months.
His weight came up during his 2009 campaign against Democrat incumbent Jon Corzine, who ran an ad accusing Christie of "throwing his weight around" to get out of traffic citations while he was U.S. attorney. Christie confronted the ads head-on, telling Corzine to "man up and say I'm fat."
In April, Christie told a town-hall meeting in Hamilton, "I'm an asthmatic and I take an inhaler every morning."
In 2007, Corzine was seriously injured in a car accident on the Garden State Parkway. Corzine's femur was broken in two places and he suffered a broken sternum, six broken ribs on each side, a head laceration and a fracture on a lower vertebrae.
