Fetal Heart (Histology for Path)

Question 1

What day of gestation does the fetal heart beat?

Answer 1

17

Question 2

What vessel carries oxygenated blood from the placenta to the fetus?

Answer 2

Placental vein

Question 3

What is the ductus venosus?

Answer 3

A branches from umbilical vein that bypasses hepatic sinusoids, thus comm. directly with IVC

Question 4

Describe the difference between fibrous and serous pericardium.

Answer 4

Serous = “epicardium”

Fibrous = “parietal”

Heterotopic (thyroid or thymus) or neoplastic things can happen here

Question 5

The endocardium is thicker in the—atria or ventricles?

Answer 5

Atria

Question 6

Where do dense-core granules occur?

Answer 6

Atrial myocytes

Question 7

What is the eustachean valve?

Answer 7

An inconstant, rudimentary valve in the IVC, designed to direct blow flow into the FO during fetal life.

Question 8

Another name for the outflow tract.

Answer 8

Infundibulum conus

Question 9

What separates the inflow and outflow tracts?

Answer 9

The crista superventricularis, a muscular arch

Question 10

Where is myocyte disarray normal?

Answer 10

Within the trabeculated musculature of the right ventricle

Question 11

What is idiopathic hypertrophic subaortic stenosis (IHSS)?

Answer 11

Muscle fiber disarray involving the intermediate bublospiral muscles of tne intraventricular septum

Question 12

Define the triangle of Koch

Answer 12

1. Coronary sinus
2. Membranous IVS
3. Above TV annulus