12 Questions
What is characteristic of a dynamic subaortic obstruction velocity curve?
Concave upward in early systole
What is the transvalvular aortic gradient?
The pressure difference between the left ventricle and aorta in systole
Why is the calculation of the mean gradient important?
It has potential advantages over the peak gradient
How is the transaortic pressure gradient calculated?
Using the simplified Bernoulli equation
What is the relationship between the peak gradient and mean gradient?
There is an overall good correlation between the two
How is the mean gradient calculated?
By averaging the instantaneous gradients over the ejection period
What is the primary use of the CWD velocity curve in determining the type of obstruction?
To differentiate between fixed and dynamic obstructions
What is the typical shape of the velocity curve in early systole for dynamic subaortic obstruction?
Concave upward
What is the advantage of reporting the mean gradient over the peak gradient?
It provides additional information about stenosis severity
What is the relationship between the peak velocity and the maximum gradient?
The peak velocity squared is proportional to the maximum gradient
What is the purpose of calculating the mean gradient?
To provide a more accurate representation of stenosis severity
What is the variable used to calculate the transaortic pressure gradient?
Velocity
Learn about the diagnosis of aortic stenosis through velocity curves and pressure gradients. Understand how to determine whether the obstruction is fixed or dynamic and calculate the transvalvular aortic gradient.
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