Sen. Mark Kirk was hospitalized after suffering a stroke over the weekend and underwent surgery Monday in Chicago, his office said.
According to a statement, Kirk, 52, checked himself in to Lake Forest Hospital in the Chicago area on Saturday, where doctors discovered a carotid artery dissection in the right side of the neck.
After being transferred to Northwestern Memorial Hospital in Chicago, further tests showed the senator had suffered an ischemic stroke.
On Monday, Kirk underwent "successful" surgery to relieve swelling around his brain that resulted from the stroke, the statement continues.
"Due to his young age, good health and the nature...