Sen. John BoozmanJohn Nichols BoozmanGOP senators introduce resolution endorsing ICE Lobbying world 13 GOP senators ask administration to pause separation of immigrant families MORE (R-Ark.) returned to work in Washington Monday after having emergency heart surgery in April.

He tweeted about his return on Monday.

Boozman, 63, underwent emergency heart surgery on April 22 to correct an acute aortic dissection. Former U.S. diplomat Richard Holbrooke died from the same condition.

Boozman had been suffering from chest and shoulder pain and was checked into a hospital in Rogers, Ark.

He was elected to the Senate in 2010 after serving 10 years in the House. Before his congressional career, he worked as an optometrist.