Ths has I think, every question you could possibly think to ask, and more about MVP...
Here is a link that might be useful: Mitral Valve Prolapse q&a's
MVP is grossly overdiagnosed and overtreated. The following url contains a great deal of information about this problem of overdiagnosis and the ramifications of this problem.
Here is a link that might be useful: http://heartdisease.about.com/library/weekly/aa073100a.htm
Leigh_K