My mother has peripheral artery disease with severe occlusion. Angiogram has been recommended; should we put her through this procedure?

Update: After speaking with my mother's primary care provider (doctor) and the vascular surgeon, both strongly recommend the angiogram "to relieve current symptoms" (e.g., pain, swelling, discoloration) by restoring blood flow to both lower extremities. The procedure also will decrease the risk of pressure ulcers; gangrene; and amputations, which will likely occur since there is currently minimal, if any, blood flow. This procedure is scheduled for Friday, January 24, and I will accompany her. I informed my half brother, who concurs with the decision. Although the procedure is considered "minimally invasive" with no sutures or general anesthesia required (local and "conscious sedation" only), the risks include blood clots, stroke, and infection up to 14 days after the procedure. We are prepared for the worst case scenario and hoping for the best. Thank you for your kind support and thoughts.

I thank everyone for their very helpful comments and support. I will be speaking with the doctors tomorrow, hopefully, and will let you know our outcome.

I'd want to know how painful this is for her now, along with how slowly can gangrene take to set in and what amounts of pain and misery that will bring. In other words, is this something that can slowly kill her vs. having the angiogram done to relieve the symptoms at this point. It's one thing to let nature take it's course, but this seems a pretty bad way for nature to take it's course. Of course, I'm not up on this particular subject, so maybe it isn't as bad as it seems. It's pure h*ll to be between one bad choice and another bad choice! So hard to know what to do and I'm so sorry you have to go through this, and sorry for your mom! If Hospice isn't already in the mix, I think I would request them at this time.

AlvaDear raises some good points.
My first answer is based on the belief (perhaps totally unfounded) that the angioplasty is not a terribly lengthy or difficult procedure. I also responded with the understanding that she has already reached a point where unpleasant effects of doing nothing are imminent, if this is some thing that "may" occur years down the road then I might be more willing to take a wait and see approach. And it goes without saying that her overall health and life expectancy needs to be considered as well.

Are you able to talk with your Mother? Will this improve her quality of life and/or it will certainly help with the pain. I personally would want more information from the doctors.
I also agree with what another poster said, there are risk in all types of surgeries. If she were to develop gangrene and have to amputate that leg-the same risk would be there.
I am praying for you and sending you positive thoughts. This must be so hard for you. Get other drs opinions, too if you can.
So sorry you are facing this.

My vote goes to know. Let us say they come back with the diagnosis of severe occlusions? What would you do about that? Surgery? I think not.
I do believe they mean that she would be a code during the surgery. I would not agree to that. That is to cover them saying they have not killed her by opting for surgery. She would not be a full code for life; still I disagree with this full code in a person this age.
Gangrene is no joke, but you currently are not looking at gangrene.
Let me put it this way. I would not want this done to me. At 84, in this debilitated condition I would want permission for a final exit (allowed in my state with the 6 month rule) or hospice care. Making the decision for someone I loved I would say no.
With your mother bedridden you would be dealing with very poor circulatory healing, with clots, with blood thinners, then with complications of blood thinners. Those things almost certain. It surprises me that they would recommend this for an 84 years old.
Much of this you must decided knowing your Mom and what she would wish. My brother once told me he wanted surgery on his brain tumor in order that they WOULD almost certain kill him at 85. That was after a doctor recommended it and I had said no. So here we were ready to say YES, and the surgeons changed his mind fast and said "Oh, we would never do that surgery at this age". So there you are. Doctors turn on a dime and one recommends the other forbids. So on you go, making the best decision you are able. Whatever decision you make, and whatever the outcome, this is not a win situation, and I hope you will NEVER blame yourself. Wishing you good luck.

Is Mom of sound mind? Can she make her own decisions? If so, give her the facts and let her decide. What I see here is a Catch 22. She will die if you don't and could die if you do. Me I would go for the surgery only because I don't think she will ever be able to go thru amputations at her age. My GF had her lower leg amputated at about the age of 60. She went thru a lot of pain.

The DNR can be lifted for a procedure I think. My Aunt requested a DNR and then when she saw them put the sticker on her bed, she reneged. Its not written in stone. Just be aware any surgery is risky. For an 84 yr old in Moms condition even more so.

The benefits seem worth the risk to me, the long term complications of leaving things untreated are not something anyone should have to face. To me the real sticking point is the full code, I think I'd want to hammer out with her doctors what exactly they mean by that - I understand they don't want to let her die on the operating table but how far you and they are willing to extend the full code beyond that needs to be discussed and the previous DNR respected.