FE Fetal Cardiac Anatomy & Development 3

Question 1

The truncus arteriosus divides into the aorta and pulmonary trunk through which process?

Accepted Answer

Spiraling of the aortopulmonary septum

Answer

Neural crest–derived cells form a spiraling aortopulmonary septum that divides the truncus arteriosus into the aorta and pulmonary trunk.

Question 2

Which fetal structure preferentially directs highly oxygenated IVC blood across the foramen ovale to the left atrium?

Accepted Answer

Eustachian valve (valve of the inferior vena cava)

Answer

The Eustachian valve directs oxygenated blood from the IVC through the foramen ovale into the left atrium, supplying the brain and coronary circulation.

Question 3

At 20 weeks gestation, the normal fetal heart rate range is approximately:

Accepted Answer

120–160 bpm

Answer

Normal fetal heart rate at mid-gestation ranges from 120 to 160 bpm, reflecting parasympathetic and sympathetic balance at this stage.

Question 4

Which segment of the interventricular septum is derived from endocardial cushion tissue?

Accepted Answer

Inlet (membranous) septum

Answer

The inlet (membranous) portion of the interventricular septum develops from fusion of the endocardial cushions.

Question 5

In the standard outflow tract view, the aorta and pulmonary artery should cross each other at approximately what angle?

Accepted Answer

90°

Answer

The aorta and pulmonary artery cross at approximately 90° in the normal fetus, reflecting the spiral division of the common truncus.

(FE) Fetal Echocardiography Certification Practice Test

(FE) Fetal Echocardiography Certification Practice Test

FE Fetal Cardiac Anatomy & Development 3