A complete heart stress test takes about 4 hours-4-parts. Before pictures in color after being injected with a chemical. Then doing a tread mill test with more chemicals being injected as you move.Then after pictures to confirm any differents in test. The next step a image of your heart in motion as a tech moves a probe with cold lubicate across your chest. I was amazed at this process,and thankful of the out come. I got my ok for ocean swimming,the back ground information for my ocean swim was more techincal than I had describes before. To compete in underwater events requires very strict judgeing and techincal skills.I will by pm consider request for Information that compares me to the general population for underwater skills that are offical.Only members that can hold information to them selfselfes need ask.I will ask a moderator to consider a violation of my privacy by some jokester. I think I have a few real friends on this forum.