Thanks for your query.
Post CABG left testicular pain
is not a common entity.I don`t think it is related to your CABG. It is a separate entity ,so look from that angle only .It is most commonly due to some mild infection or varicocele
.so consult the local surgeon to find the cause & get it treated
‘Hope I have answered your query, I will be available to answer your follow up queries, “Wish you Good Health and trouble free speedy recovery”