I had a stress test, This came back positive, I had 3 stents put in 4 years ago, now im told i need a heart cath, im 78% cloged where 3 stents are, and 98% on left side, I do have congestive heart failure, high blood presure, diabetis , also severe nerve damage to C- 3 to my feet, now 2-weeks ago,my heart cath was put off due to heart DR, droping me due to heroin withdraws, with positive strees test, and bad family medical history, how bad is my need to get on next medical move? I dont do heroin anymore, I dont know what to do?