im posting my question again ,,,,,y? no body answered my previous question,my dad has rheumatic heart disease.he is 48.his mitral valve size was 0.9cm square,but after mitral valvoplasty ,(ballon)size became 1.6 cm sqaure,but after one year the echo test shows his size is 1.5 cm sqaure,does the size will decrease like this only,this fast?or iits just that the differnt echo machines shows differnt size?plz tell me what to do,im very scared,can mitral valvoplasty can be done 2nd time?