A statement from press secretary Sarah Huckabee Sanders on Tuesday confirmed that Kudlow was expected to return to work "soon," but gave no timetable for the aide's recovery.
"National Economic Council Director and Assistant to the President Larry Kudlow is expected to remain at Walter Reed National Military Medical Center as a standard precaution after experiencing what his doctors say was a very mild heart attack yesterday," Sanders said.
"His doctors expect Larry will make a full and speedy recovery. We look forward to seeing him back at work soon. Larry and his wife Judy wanted to express heartfelt appreciation for all of the thoughts, prayers and well-wishes," she added.
The statement mirrored one from the White House Monday night, which added that the president and his family sent their "thoughts and prayers" for Kudlow's recovery.
"Our Great Larry Kudlow, who has been working so hard on trade and the economy, has just suffered a heart attack. He is now in Walter Reed Medical Center," Trump tweeted Monday as he attended his historic summit with North Korea's Kim Jong Un in Singapore.
Kudlow had made headlines over the weekend when he ripped Canadian Prime Minister Justin Trudeau for an announcement of reciprocal Canadian tariffs, telling CNN's "State of the Union" on Sunday that Trudeau “stabbed us in the back" at the Group of Seven (G-7) summit last week.
“He did a great disservice to the whole G-7,” Kudlow told CNN.