Chitra Valve : This valve was designed and developed at Sri.Chitra Institute of Medical Sciences in Thiruvananthapuram and marketed by TTK Industries. It is a tilting disc valve. The occluder (disc) is made of ultra high molecular weight poly ethelene (UHMWPE). The housing (cage) is made of Haynes-25 alloy. Haemodynamics of the valve are excellent and even though the disc is not rigid, mechanical failures have not been reported. Like all other prosthetic valves, anticoagulation and endocarditis prophylaxis are required.