Question

Which of the following statements is true regarding the color flow evaluation of aortic stenosis?

A) Reynold's number will be 1000-1500 in the area just distal to the stenosis
B) A variance color map will demonstrate a green color in the aortic root, just distal to the stenosis
C) The greatest amount of turbulence seen with aortic stenosis is at the valve
D) When using a velocity map, aortic stenosis will cause a mosaic color pattern in the LVOT

Answer 1

The true statement is that the greatest amount of turbulence with aortic stenosis is observed at the valve. This is displayed as a mosaic color pattern on Doppler ultrasound at the level of the stenotic aortic valve.

Step-by-step explanation:

The true statement regarding the color flow evaluation of aortic stenosis is that: The greatest amount of turbulence seen with aortic stenosis is at the valve. When evaluating aortic stenosis using Doppler ultrasound, the blood flow velocity is higher due to the narrowing of the valve, which causes turbulence and a heterogeneous, mosaic color pattern on the imaging. This pattern is observed at the level of the stenotic aortic valve itself where the flow is constricted. The variance color map does not typically show a green color in the aortic root just distal to the stenosis, but a mosaic of varied colors due to the mixture of different blood flow velocities. Reynold's number indicating the onset of turbulence is typically above 2000.

Answer: C) The greatest amount of turbulence seen with aortic stenosis is at the valve