I Was Exposed To Agent Orange As A Combat Marine

I was exposed to Agent Orange as a combat Marine while serving in Vietnam. I have had prostate cancer, which is recognized as a "presumptive condition" by the VA for exposure to Agent Orange. I also have both lbbb and rbbb, and as a result of that I have a cardiac pacemaker. The pacemaker operates at 100 percent, initiating every beat of my heart. Can you please tell me if Agent Orange has been associated with lbbb and rbbb. Thank you...