I Have Been Diagnosed With Chronic Microvascular Ischemic Changes And

I have been diagnosed with Chronic Microvascular Ischemic changes and a remote infarct involving the right basal ganglia. A brain MRI w/o contrast was the source of this info. I also have CAD with a stent in my LAD and, in 2011 was diagnosed with Idiopathic Axonal Peripheral Neuropathy. I'm 77 years old and in the last year or so have seriously lost my ability to walk or just "function" due to extreme loss of balance -- whether moving or standing still. No one seems to know what is causing this ... suspects are: my age, the neuropathy, and Plavix (which I've been taking since Jan 2011). Any thoughts??