text: Your explanation is very vague.  A defective mitral valve?  There are several different conditions that could be possible.\nFirst of all, a heart murmur is rarely a serious condition.  Most heart murmurs are present at birth, and never adversly effect the individual, throughout their lifetime.\nSecondly, the most common condition occuring in conjunction with a murmur is called mitral valve prolapse.  Also, usually not a big deal.\nIf you are unclear on your diagnosis, or feel you aren't receiving adequate information from your physician, find a new one!  Ask for copies of your echo and go to someone who can communicate with you to meet your needs.