Hi Richy,
I presume you have an abnormal left coronary artery arising from the pulmonary artery (ALCAPA) or other similar condition with a single right
coronary artery that supplies most of your
heart (what Pete Maravich had I believe). While it is difficult to give you any definitive recommendation without knowing more about you, your symptoms, and your past medical history, I can say that if you have survived into your 60s with this, then the news is quite good!