FE FE Doppler Assessment 2

Question 1

Which parameter is derived from the aortic isthmus Doppler and used to assess fetal cardiac reserve?

Accepted Answer

Isthmus flow index (IFI)

Answer

The isthmus flow index (IFI) is calculated from the aortic isthmus and reflects the balance between cerebral and placental vascular resistances.

Question 2

Reversed diastolic flow in the aortic isthmus indicates:

Accepted Answer

Severe hemodynamic compromise with cerebro-placental pressure reversal

Answer

Reversed diastolic flow in the aortic isthmus reflects severe hemodynamic compromise where descending aortic pressure exceeds aortic isthmus pressure throughout diastole.

Question 3

Tricuspid regurgitation velocity on Doppler can be used to estimate:

Accepted Answer

Right ventricular systolic pressure

Answer

Using the modified Bernoulli equation (4v²), tricuspid regurgitation jet velocity estimates the right ventricular-to-right atrial pressure gradient.

Question 4

Which Doppler finding supports a diagnosis of fetal coarctation of the aorta?

Accepted Answer

Discordant ventricular sizes with right heart dominance and aortic arch hypoplasia

Answer

Coarctation is suspected when there is right heart dominance, a hypoplastic aortic arch, and discordant ventricular sizes with left heart hypoplasia.

Question 5

Pulmonary venous Doppler shows which pattern in the normal fetus?

Accepted Answer

Biphasic flow with systolic and diastolic peaks

Answer

Normal fetal pulmonary veins show biphasic forward flow with systolic (S) and diastolic (D) peaks, similar to postnatal patterns.

(FE) Fetal Echocardiography Certification Practice Test

(FE) Fetal Echocardiography Certification Practice Test

FE FE Doppler Assessment 2