ST. PAUL — Minnesota Gov. Mark Dayton was released from the hospital Monday afternoon, a day after the 69-year-old governor fainted at a hot and crowded event.

Dayton’s office said the governor had been feeling pressure in his lower back before he lost consciousness Sunday evening at a function for a state representative’s volunteer campaign staff in the Twin Cities suburb of Woodbury. He underwent elective back surgery in early December.

After undergoing tests and receiving fluids for dehydration, Dayton was released from Regions Hospital in St. Paul, deputy chief of staff and senior adviser Bob Hume said in a statement. Hume said Dayton planned to return to the governor’s residence in St. Paul and would resume his normal work schedule on Tuesday.

Dayton canceled a lunch with a top lawmaker during his brief hospital stay. Throughout his treatment, Dayton’s office said the governor was in good spirits, joking with staff and was eager to get back to work.

Hume said Dayton had been making the rounds at the Sunday event before he began to feel the pressure build in his lower back, started to feel light-hearted and later fainted. After fainting again on his way to the car to return home, he was brought to Regions Hospital.