Dianne,
Here is an excellent link for info on the diagnosis of heart failure from the American Association of Family Physicians:
[url]http://www.aafp.org/afp/20000301/1319.html[/url]
Absent the cough, I think heart failure is not your problem.
BUT persistent edema IS. There are a multitude of causes and if you search out "edema causes" you will find a week's reading.
Personally I think that Cozaar and a diuretetic work well together. I find the slightly hyperkalemic tendencies of losartan are more than balanced balanced by the stronger HYPOkalemic tendencies of most diuretics. I take Cozaar and HCTZ and ALWAYS have a slightly low, though symptomless, K+ (and low Na+.)
Make sure you ask your cardiologist to SPECIFICALLY rule out CHF for your mental well being

!