advice on avodart

Hey everyone

Haven't been on this forum for awhile now and wanted to ask a question to see everyones opinion. I want to start taking avodart maybe 2-3 times a week but the other day I read somewhere that avodart has known to cause heart failure. My issue is what are the chances of something like that happening considering so many people are taking it for hairloss. Im worried cause my cardiologist told me I have a mitral valve prolapse. Do you think avodart will effect it in anyway? Thanks