Occluded LAD

My brother had a heart cath 11-08. He was diagnosed with a 50 % occluded LAD and a 20% RCA. He had a cath 9-11 at a different facility by a different heart group and he has been told that his heart is completely clean with no blockages. He has been on Coreg for the past 3 years and a statin drug for 1 year. Is it possible that he would show absolutely no coronary disease like this?

[ed34]

Well, your brother needs to establish what it was that cleared his arteries, bottle it and sell it. He will become millionaire in an hour. Apart from the medication, what else did he do?

[Occupant]

I assume they put him on Coreg after his first Angiogram and that was in response to some symptoms that he had. But IMHO neither one of these tests addressed his problem.