Can I go right back to the gym after surgery?

No. I recommend that patients avoid training chest for four weeks. They should start that third week with light weights, maybe machines, even, just to get the blood flowing and so on. Gradually, heavier weights can be used. By not training chest for three or four weeks, they can avoid development of a fluid collection or other problem in the are of the surgery. After that, they should start back in slowly to avoid injury. Most patients are back to normal six weeks after their surgery, but their sanity has been maintained since they've been training all along.