Valvular heart diseases :  Congenital and acquired valvular heart diseases often require surgical intervention. 1 is well known that conservative surgery by valve repair gives better long-term results. However if satisfactory repair is not possible valve will have to be replaced. In that case one has to choose the ideal valve based

on the age, sex of the patient, necessity and problems of lifelong anticoagulation. Complications of prosthetic valves and those associated with anticoagulation have to be taken into account while making a choice. Prosthetic valves are prone to endoearditis and patients will need prophylactic antibiotics.