Kind of in the same boat brother. I feel what you are going through.
I have had a pacer since I was 22. 2 years ago they put an ICD/Pacer in at UPMC Pittsburgh because my ejection fraction had dropped from 40% back when i was 22 to around 35%. Thankfully they did, on 08/31/12, after an easy deadlift workout of 315 for 5 sets of 10, I died on the couch for 14 seconds and was shocked back to life from my device.
Since then I have left UPMC and I am now a patient of Dr. Cantillon at the Cleveland Clinic: http://my.clevelandclinic.org/staff_dir ... orID=14034
The first thing he did was look at my numbers and say that I am only pacing at 83% due to the several hundred thousands of PVCs I have. So, we started Coreg 25 mgs twice a day and 10 mgs once a day of Lisinopril. The hope is this will reduce the PVCs and get me pacing at 98-99% which will boost my ejection fraction back up and keep me from dying again. Always a good thing. He had a female patient go from an EF of 17% and thinking it was time to put her on the transplant list to a EF of 70% and she feels great just from that regimend alone.
So far I feel better. I have a lot more energy then before, but I get winded quick from the beta-blocker. I go back mid-December. If he isnt happy with the results, he is going in and doing an ablation to stop the damage from my PVCs. We aren't talking transplant yet as my EF is still decent.
However, I have a friend who had a heart transplant and he is doing awesome: http://www.mensfitness.com/training/suc ... jim-murphy
Good luck brother.