<prompt> A 68-year-old man presents with progressive shoness of breath. He had a metallic hea valve replacement 13 years ago for severe aoic stenosis. Which of the following clinical findings is most indicative of a failing aoic valve replacement?Clicking sound to S2Early diastolic murmur heard at the left sternal edgeNew onset atrial fibrillationEjection systolic murmur heard in the aoic region  <response>: Option B: Early diastolic murmur heard at left sternal edge We know if metallic valves get older undergo on sheering stress, so there will be backflow of blood from aoa to L.V so early diastolic murmur heard at left sternal edge. Severe aoic stenosis : 1.Transvalvular pressure gradient of 40 mmHg. 2. Ejection velocity - 4 msec 3. Size of orifice - 0.6 cm2 m2 BSA 