Whether or not its the same thing, I dont know but when going for a class 2 a few years ago I was told that I have "Incomplete Right Bundle Branch Blockage," (atleast I think thats what it was called). The AME forwarded the results to the CAA who said that it would cause no problem if I ever went to get a Class 1. What heart murmur actually means I don't know but if its the same thing I was diagnosed with, the above might be of some help.
Best of luck.