The success rate of surgery for valve change varies according to the clinical condition of the patient, but in generic terms, for aortic valve replacement, it is to the tune of 97-98% and for mitral valve replacement, around 95-96%. The cost of surgery generally ranges from Rs.1.5 – 2.0 lacs, depending on the room facility that you choose, plus the cost of valve which could vary from Rs.40-60,000.