California Sen. Dianne Feinstein is "working from home and resting comfortably" after undergoing a "routine, voluntary medical procedure" to install a pacemaker, her office said Wednesday.
Feinstein underwent the non-emergency procedure on Tuesday at George Washington University Hospital, her office said in a statement.
The pacemaker was installed after recent tests "out of an abundance of caution," press spokesman Tom Mentzer said in an email. He declined to provide additional details.
Feinstein, 83, is the top Democrat on the powerful Senate Judiciary Committee. On Tuesday, before the pacemaker procedure, she raised tough questions for Sen. Jeff Sessions (R-AL), President-elect Donald Trump's nominee for attorney general.
At the nationally televised hearing, Feinstein raised concerns over Sessions' record on civil rights, discrimination, torture, hate crimes and immigration, and how he'll enforce the law of the land.