Your heart problems are not insurmountable, however they are a bit complicated. Has your doctor ever spoken about an ablation for the ventricle area? I know Mayo clinic has done research on ventricle problems, i.e. PVCs, and I am positive they have done the same for ventricular tachycardia. I can sum up what I understand about the ventricle area....the left side is the one that sends the blood out to the rest of the body and if it does not fill up enough the blood is being sent out in small amounts. Not sure if that is what is happening...the smaller amounts being sent in your case, but it might be.

I wish you the best and know that tMayo clinic is probably on this problem like they are on PVCs.