This diagnosis was backed up by an
Angiogram, which showed a 80-90% blockage in
the Right Coronary Artery (RCA).
The vessel is non-dominant, but you needn't be concerned about that, it's just how the vessels are laid out. Some are left dominant, some right dominant and others co-dominant.
BPH can be read about here...
Benign prostatic hyperplasia
http://en.wikipedia.