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Aortic Stenosis Diagnosis

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Questions and Answers

What is characteristic of a dynamic subaortic obstruction velocity curve?

Linear increase in velocity

Erratic velocity pattern

Concave upward in early systole (correct)

Triangular shape

What is the transvalvular aortic gradient?

The pressure difference between the left ventricle and aorta in systole (correct)

The pressure difference between the right ventricle and pulmonary artery

The pressure difference between the aorta and left atrium

The difference between the left atrium and left ventricle pressures

Why is the calculation of the mean gradient important?

It has potential advantages over the peak gradient (correct)

It is only used in research studies

It is easier to calculate than the peak gradient

It provides a more accurate measurement of stenosis severity

How is the transaortic pressure gradient calculated?

Using the simplified Bernoulli equation Signup and view all the answers

What is the relationship between the peak gradient and mean gradient?

There is an overall good correlation between the two Signup and view all the answers

How is the mean gradient calculated?

By averaging the instantaneous gradients over the ejection period Signup and view all the answers

What is the primary use of the CWD velocity curve in determining the type of obstruction?

To differentiate between fixed and dynamic obstructions Signup and view all the answers

What is the typical shape of the velocity curve in early systole for dynamic subaortic obstruction?

Concave upward Signup and view all the answers

What is the advantage of reporting the mean gradient over the peak gradient?

It provides additional information about stenosis severity Signup and view all the answers

What is the relationship between the peak velocity and the maximum gradient?

The peak velocity squared is proportional to the maximum gradient Signup and view all the answers

What is the purpose of calculating the mean gradient?

To provide a more accurate representation of stenosis severity Signup and view all the answers

What is the variable used to calculate the transaortic pressure gradient?

Velocity Signup and view all the answers