According to the TMZ connected to bodybuilding legend Schwarzenegger, 70, went to Cedars-Sinai Thursday for a catheter valve replacement.
Surgeons apparently hit complications during the “experimental” procedure, though he is now understood to be in a stable condition.
The file replacement force physicians to carry out open-heart surgery on the Schwarzenegger which lasted several hours.
It isn’t the first time the 7-time Mr Olympia has undergone heart surgery.
Schwarzenegger had elective surgery to replace a defective, congenital aortic heart valve in 1997 when he was 50.
The news comes as a shock, especially when considering how strong and healthy Arnold Schwarzenegger looked at the recent Arnold Sports Festival events that took place both in Columbus, Ohio and Australia.
Arnold opted against having a mechanical valve because he believes it might limit his ability to workout which he was still doing.
We are following this story and will keep you updated as it develops.