FE FE Cardiac Biometry & Measurements 2

Question 1

The myocardial performance index (MPI, Tei index) is calculated using which formula?

Accepted Answer

(ICT + IRT) / ET

Answer

ET / (ICT + IRT)

Answer

ICT / (IRT + ET)

Answer

(ET + IRT) / ICT

Question 2

The normal fetal left ventricular myocardial performance index (MPI) is approximately:

Accepted Answer

0.30–0.45

Answer

Less than 0.20

Answer

0.50–0.65

Answer

Greater than 0.70

Question 3

In early second-trimester fetuses, the mitral and tricuspid valve E/A ratio is typically:

Accepted Answer

Less than 1.0 (atrial contraction wave dominates)

Answer

Greater than 1.0 (passive filling dominates)

Answer

Exactly 1.0

Answer

Not measurable before 24 weeks

Question 4

Which Doppler measurement at the aortic isthmus best reflects the balance between cerebral and placental vascular resistance?

Accepted Answer

Pulsatility index (PI)

Answer

Peak systolic velocity

Answer

End-diastolic velocity alone

Answer

Time-averaged mean velocity

Question 5

The ductus venosus pulsatility index for veins (PIV) is calculated as:

Accepted Answer

(S − a) / TAMXV

Answer

(S − D) / TAMXV

Answer

(S − a) / D

Answer

S / (D + a)

Question 6

In a healthy fetus, the Doppler waveform at the ductus venosus during atrial contraction (a-wave) should be:

Accepted Answer

Forward (positive) flow

Answer

Absent (zero flow)

Answer

Reversed (retrograde)

Answer

Biphasic with brief reversal

Question 7

Under normal circumstances, blood flow at the aortic isthmus (AoI) during diastole should be:

Accepted Answer

Anterograde (forward)

Answer

Absent (zero net flow)

Answer

Retrograde (reversed)

Answer

Bidirectional and equal