Sorry to hear of your wife's situation. Does she in fact have closure of some or all of her bypass grafts? Does she have stenosis (narrowing) of any of the bypass grafts? Those might be treatable with
angioplasty ballooning or stenting. What you describe is "diffuse" or severe narrowing of the smaller arteries of her heart, or of the distal (farthest-along) parts of her larger coronary arteries. Those blockages are usually too small or too widespread to treat with balloon or stent catheters.
The way we try to treat those is with a
Statin (cholesterol-lowering medication), which she is taking; control of
hypertension and
diabetes (which the other 2 medicines should do); discontinuation of
smoking if that is an issue for her; and sometimes the addition of nitrates (such as
Isosorbide) and/or Ranolazine (a medicine that has been shown to decrease
shortness of breath with exertion and increase exercise tolerance in people with distal coronary blockages such as your wife's).
I recommend you ask your wife's Cardiologist about those latter 2 drugs, as well as whether she has had a recent angiogram to show us the state of her bypass arteries.
Good luck, and let us know how she does.