I had leg pain when walking for a number of years before the cardiac issue came on the scene. The condition is called PAD (peripheral arterial disease). I did have balloon angioplasty in part of the femoral artery, behind the knee and two of the three arteries below the knee. There was also talk of a bypass behind the knee but sadly this never happened and everything has reverted. Whilst there is a cardiac issue the vascular surgeon will not consider further intervention. Many of the treatment guidelines are much the same, healthy low fat diet, exercise within your capabilities (I suffered quite a bit of cramp before the angina arrived first!), lowering cholesterol if necessary and absolutely NO SMOKING (it is often called "smokers leg"). I hope this is useful to you and do let us know how it goes.
I too have had leg pain while walking since the femoral angiogram 3years ago. I really do feel for you.
I finally found out I have a constricted artery due to the angiogram. The normal procedure would be to do a balloon angioplasty, however I have CKD with a low eGFR, which precludes the procedure. At least, that is what the vascular surgeon told me.....it is a choice between your kidneys or your leg, and you don’t want dialysis. Apparently it would require contrast dye, which can be harmful to the kidneys in my case. I am still reeling with this news. It does help to know it is not uncommon, although I don’t like the fact that others are suffering. Hopefully, they will come up with an answer for this problem. I
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Angiogram rules
Angiogram specifically through the wrist
Waiting forever after complications with an Angiogram
Angiogram
Pondering over a third Angiogram attempt. 
