Updated 12:55 p.m. | Rep. John D. Dingell underwent a “minimally invasive” heart procedure today at Henry Ford Hospital in Detroit and is “resting comfortably,” according to his office.  

“He recently developed atrial fibrillation, and the procedure will seek to find the source of the abnormal heart rhythm and correct it. He is expected to stay in the hospital overnight and be released Friday,” his office said in a statement.  

The Michigan Democrat plans to have a light workload during next week’s recess and plans to return to work when Congress reconvenes March 24.  

Dingell recently announced that he would not run for re-election .