Please show the work 2. Aortic Valve Replacement A patient with a stenosed aorti
ID: 3517751 • Letter: P
Question
Please show the work
2. Aortic Valve Replacement A patient with a stenosed aortic valve has a pressure drop across the diseased valve of 30 mmHg at a CO of 5 L/min and a HR of 72 bpm. The healthy valve orifice area should be 21 mm. The patient undergoes an aortic valve replacement. The new aortic valve is a 20-mm bileaflet valve. After surgery, the mean velocity just downstream of the replacement valve is measured to be 1.01 m/s. Assume a discharge coefficient of 0.62 for the valve Compare the pre-and post-surgical ?p and Performance Indices. Based on these two measures, was the surgery successful?Explanation / Answer
Pre surgical mean transaortic pressure gradient is 30mmHg which signifies stenosis of aortic valve and post surgical mean transaortic pressure gradient 4.084mmHg which signifies that the surgery results in treatment of stenosis.
Stenosis of the aortic valve leads to decrease in outflow of blood through aortic valve as after the surgery valve orifice area has returned to normal and new aortic valve area is 3.14 cmsquare which is normal... So the surgery results in a successful result.