Usually the local University medical center will have doctors with the most experience in dealing with complex issues. Ablation of the AV node with pacemaker placement is one solution to highly symptomatic palpitations that are coming from the atrium. It would solve the feeling of rapid heart rates and may or may not aleviate your other symptoms. There are some potential problems with pacemakers however and these risks must be weighed against the benefits. A second attempt at finding the source of the arrhythmia with ablation of the source is a second option.
Medications do have side effects but are a good option for some people.
Your prior surgery could be part of the reason you are having these arrhythmias but it would be difficult to say for sure. The approach of trying medications first before a pacemaker is reasonable and may be worth a try. Ultimately however the choice is up to you. Information contained within this forum is intended solely for general educational purposes and is not intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Only your physician can provide specific diagnoses and therapies.