1-what is most common cause of Aortic Stenosis? 2-What is Clinical picture of Aortic Stenosis? 3- How does AS lead to death ? 4-What is the difference between Mechanical and Tissue Valve? 5-What are the surgical options to treat Aortic Stenosis ? 6-what is the non - surgical option for Valve replacement ? 7-If metallic valve replacement was done and the patient developed Infective Endocarditis what will be your next step? 8-Why? 9-what is the commonest Bacteria cause infection of prosthetic valve ? 10-If you find microscopic branching Hyphae on the removed valve, What is the cause ? Types ?