JPMorgan Chase CEO Jamie Dimon is expected to "fully recover" after having an unplanned heart surgery, according to a person who was briefed by his doctors.

Dimon, 63, was in touch with the bank's senior leaders Friday, a day after the emergency procedure to repair an acute aortic dissection, the person said. Dimon, who has led JPMorgan since 2006, suffered chest pains Thursday morning and checked into a hospital before the tear in his aorta worsened, this person added.

"We expect him to fully recover," said the person, who declined to be identified speaking about the chairman and CEO's health. "We talked to his doctors, and they are happy so far," the person said, cautioning that with any such procedure, there could be unforeseen complications.