Thursday's operation lasted several hours, TMZ website reports.
A spokesman for Arnold Schwarzenegger, on Saturday, said is in "good spirits" after a scheduled surgery.
The elective surgery took place to replace a valve in Arnold's heart which had previously been replaced in 1997.
Schwarzenegger, a former champion bodybuilder and star of films including the "Terminator" franchise, "Conan the Barbarian", "Predator" and "True Lies", was California's 38th governor, serving from 2003-11. The star experienced complications after the "somewhat experimental" procedure.
In a statement on Twitter, Ketchell said that the former-body builder chose to have the pulmonic valve replacement by catheter.
An open-heart surgery team was ready during the procedure, but Ketchell said their presence wasn't unusual in such circumstances.
Cedars-Sinai hospital refused to confirm Schwarzenegger's treatment, citing privacy laws, but his spokesman publicly thanked the medical team for their "tireless efforts". "If it is time and necessary to have treatment, open heart surgery can be lifesaving".
The renowned actor is reportedly recovering well and purportedly commented after waking from surgery: "I'm back".
The actor said at the time, "It was very painful, much more painful than the heart surgery". He later got into politics, serving two terms as the Governor of California.
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