Q. All of the following are relative contraindications of mechanical prosthetic valve except? A. Long expected lifetime B. Unreliable anticoagution therapy C. Pregnancy D. Previous thormbosed valve Answer: A. Long expected lifetime Explanation: Long expected lifetime is an indication for mechanical prosthetic valve as bioprosthetic valve gets degenerated in 10-15 years. Mechanical prosthetic valves have a high risk of valve thrombosis and hence require lifelong anticoagulation. Anticoagulation becomes problematic in pregnancy. And, previous history of valve thrombosis increases the risk of recurrent valve thrombosis.
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