OK Robert. We can continue after this if you'd like.
This is a problem with an enlarged prostate, also known as benign prostatic hypertrophy, and it happens in many men as they pass the age of 50. It would have nothing to do with your heart failure per se. The enlarged prostate constricts the bladder outlet and causes a residual amount of urine to be left in the bladder after urination. So basically the bladder fills a bit faster and these men find themselves urinating more frequent and that the volume of urine is less.
If you haven't had a digital (finger in the rectum) prostate exam you need one. If you have BPH there are medications like Proscar and Hytrin that can shrink the prostate and eliminate the problem