Connor Goldson came through a 13-hour open-heart operation overnight.
He spent Sunday night in the intensive care unit after doctors finished the job.
Goldson wrote a brief post just after midnight to say he's holding steady.
This was the second time in the past few months he has needed major surgery.
The defender has now left hospital and is resting at his house with his family nearby.
Medical staff have him under observation as he recovers.