Metabolic syndrome x also known as prediabetes or hyperinsulinemia or insulin resistance is when your cells, from diet or hereditary or other reasons become resistant to insulin. So when you eat carbs or sugars your pancreas (actually islets of langerhons) have to produce much much more insulin to metabolize the carbs and sugar. Because I produce so much insulin, when I don't eat, I get hypoglycemic, so my fasting sugar is low like yours, and when I do eat, my sugar goes up some but doesn't skyrocket like someone with full blown diabetes who no longer can make insuiln at all. A glucose tolerance test showed my sugar go up to 180 and higher after glucose administration, but I had hyperinsulinemia and hypoglycemia long before I had high sugar.
I did not show up as diabetic on the hb1 or whatever that test is for diabetes and never do, but my very smart hepatologist ordered a simple test of blood insulin. Its a cheap test and any primary care doc can order it.
Since hyperinsulinemia can be corrected with diet and meds, and since it can lead to diabetes, fatty liver leading to liver transplant,and a host of other problems, I wish pc docs would have included it in any middle aged person's regular labs at least once in their life. I think awareness of diabetes and fatty liver (NASH and NAFLD) will come to the forefront because the cost of liver transplants and diabetes and all the problems it creates is expensive. Its sad I had to go to a reknown hepatologist to get the simple test run and he seemed very frustrated that all my medical team could not run this one very simple but important test.
The good news is that now I'm on medication, and since I do go hypoglycemic, steroids have been less a problem. So I guess there is a silver lining.
I really really feel for you on the EMG muscle /nerve test because mine at Mayo took two hours on one shoulder and lots of pain and once one doc did it a second came in and did it all over again. They went really deap too and it hurt. I have also had the one that shocks the bottom of the feet, nerve conduction studies, which hurt really bad on me and they don't know why, now they claim fibro, but that doesn't explain why I can't walk after. Most people dont have any trouble with that test.
I had a serum electrophosphoresis and I think its the same because they look at the proteins. It was just part of bloodwork for me. I've had it twice since I have polyglandular dysfunction it puts me at risk.
Sounds like you have a good doc. I hope you don't get too worn out and that they figure out what is wrong.
Ills--Sjogrens-Lupus cond., AI polygland. dysfunction 2, hyper/hypopigment, scoliosis,kyphosis,stenosis, deg.,O.A.,spine surgeries, salivary/lymphectomies, NASH, COPD, RLS, UT/GI bleeds, hystero, brain/nerve damage,TB
Meds--INH,Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, HRT and Lidocaine patchs, Voltaren gel, Klonopin, Vicodin, Restasis, Albuterol, steroids