Over 4 years! The blood clots have turned into scar tissue at the opening ofmy right lung! I haven't been able to breathe for over 4 years! $ years ago, was misdionosed and after not being able to breathe, I took it it on my own to quit going to my Pulmonologist and went to OU Medical Center in OKC where they found the scar tissue! I am having a Ballon Angiogram done on July 31st in Dallas Hospital where a catherter will go into my groin, then up thru my heart to the opening of right lung where the surgeon will try to get as much scar tissue out as he can! It is a possibility that I will have to repeat this procedure 2or 3 times?? And ifthe surgeon can't get thescar tissue out, he will split my chest open and go in and get the scar tissue! The heck of it all, I live 600 miles round trip to Dallas!