I have mitral valve prolapse and am 24 yrs old and have somked and drank heavily since I was about your age. If you have a heart murmur it is possible that you have mvp the only way to find this out is to have an ecocardiogram. All the research I have done and the doctor's that I have talked to, it's sure that drinking alcohol and smoking cannot cause mvp, it is probably heritatary and is usually detected when a heart murmur is heard during a routing check up. However if you're having alot of the wierd symptoms that mitral valve prolapse syndrome can cause, as I deal with alot thier are some medications that can help with the symptoms, but first you have to check and see if you even have it. Also there is no eveidence that someone with mitral valve prolapse has a greater chance of having a heart attack than anyone else, so don't worry about it. I too still party and drink, not as much as I used to or would like to, I have cut back on smoking as much as I can. You have to make some lifestyle adjustments when living with this s#*! But you can still live a full and productive life.