Arnold Schwarzenegger just broke his silence after undergoing heart surgery, and says he's extremely thankful ... and of course, "I'm Back!"
Arnold said, "I went to sleep expecting to wake up with a small incision and woke up with a big one," but adds, "I woke up, and that's something to be thankful for."
As we reported, the former Governator went under the knife last week in a planned procedure to replace a pulmonic valve in his heart.
Schwarzenegger also gave major thanks to the "doctors & nurses" and said "I'm truly filled with gratitude for all of the kind messages."
Get well soon, Arnold!