I've really been worried about you. I don't want to preach to you, but you have got to get some medicine to keep your BP under control. I know that you have diabetes and the diuretics are increasing your blood glucose. That puts you in a tough situation, but you can find the right medicine for your BP, and I know that you control your diet well. I don't know if you take medicine for your diabetes or not, but isn't this a possibility, if you have to take diuretics for BP control? Have you tried all the other classes of drugs for BP control? You really need two good doctors that will work together to keep your BP and BG at tolerable, healthy levels. You must help the 2 doctors (prompt or prod them) to coordinate your treatment. Preferrably a good cardiologist and an edocrinologist.
I know that you have had a heart attack. How much damage did it do and what part of your heart was effected? Do you know your "ejection fraction"? At the time how was your heart attack confirmed, and how long ago was it when it happened? Did they do a cardiac catheterization at that time or since the heart attack? Have you ever had known coronary artery blockage(s) documented though testing? If so what type of test and what coronary arteries was/were blocked? Did you have any stents inserted?
I have had 3 nuclear scanned stress test and they are not that reliable, even when done at the best hospitals with the best equipment and techs. Approximately 40% of the time they result in false positives for blockages that aren't there. This leads to unnecessary cardiac caths. About 10-15% of the time they result in false negatives, which can lead to heart attacks due to coronary artery blockages not being found. If a person passes the stress test, but still has symptoms of coronary artery blockages, such as angina and shortness of breath, they will do a cardiac cath anyway because then, they suspect the stress test missed the blockage(s). The stress test doesn't directly check for coronary artery blockages. It does so indirectly, by checking blood flow (perfusion) into the muscle of the heart, received from the coronary arteries. The imaging device can "see" the radioactive dye that went through your coronary arteries and into your heart muscle (myocardium) during the exercise. If part of the myocardium did not receive blood (with dye), then the image of the heart will show a lack of blood flow during exercise (due to the color of the image of the heart muscle). This shows that blockages are present in your coronary arteries. They also inject you with dye while you are at rest and take more pictures. If the images taken during the resting part of the test show your heart muscle was not receiving proper blood flow, then you are in worse shape as compared to the images taken during exercise. If someone has coronary artery disease (CAD), it is expected that the heart muscle will not receive enough blood flow while running on a treadmill. But many of these same people (with CAD) will show good blood flow to the heart muscle during rest. Inadequate blood flow at rest is a sign of severe coronary artery blockage(s). If the test shows good blood flow at exercise and inadequate blood flow at rest, then they know the test was probably faulty.
I am 5' 10" and have a waist size of 36. I am a little thick in the middle, but not that bad. During the last stress test that I had, I was told that the "at rest" imaging was faulty due to my stomach. I had to come back 2 days later to be retested and it worked on the 2nd try. They did not treat you properly if they just "give up" due to your bust size. They have to keep trying. At the very least another time or maybe even more. If they could not properly image you, then the doctor should have explained the failure to you. I know that they could have made it work, because there are many women such as yourself. I would demand to have the test completed, and make sure the cardiologist takes his time and goes over the results with you.
The "gold standard" for determining coronary artery blockages is the cardiac catheterization, as you probably know, and the procedure carries risk and is not a lot of fun. I have had 3, and will probably have a few more. I have a very dangerous blockage location in my left main coronary artery. It was ~ 45% blocked in February of this year. If it were to go to >90% closed, I will check out. The blockage is called a "widowmaker". Not trying to be over dramatic, but I have to listen to my body very closely. Angina is the key for me to know when to go for a stent or bypass surgery. I have experienced a lot of angina in the past, so I know without a doubt, what to look for.
You are going to have to find the right medicines and have faith in them. Sometimes there really are no other options. With each pill comes a little poison, I have read. You need daily aerobic exercise (but don't hurt yourself), eat right and take you medicine. Be aware of any chest pain. You have already had a heart attack, like myself, and the odds of having another have increased for both of us.
I hope that you had a great Thanksgiving
Hang in there and keep us up to date on whats going on please.