What a lucky dog to have you! It is great that you caught it on time and went through with the surgery! Many people wait until it is too late and the poor dog doesn't make it to surgery, or they don't go ahead with the surgery because it is expensive. When I worked at a vet clinic years ago we had a Doberman that came in with bloat. Unfortunately the owners had waited too long and we were unable to save her, she never woke up from her surgery.
Do as much research as you can and keep in touch with your vet. I'm sure your vet would be more than willing to help you out and give you all the advice you need.