Anatomy review

Question 1

What is shown in the image?

Answer 1

Fossa ovale - remnant of foramen ovale

Question 2

What are the two types of myocytes?

Answer 2

Conduction/ contraction

Myocytes can perform both functions but tend to favour one/ other

Most myocytes are contractile

Question 3

Where does the SAN lie?

Answer 3

Between superior vena cava and right atrium

Spontaneously depolarises at a quicker rate than other cardiac cells and acts as the pacemaker of the heart

Question 4

At what level does the inferior vena cava pass through the diaphragm?

Answer 4

T8

Via the vena caval foramen

The phrenic nerve can also be found running through this foramen

*Image shows inferior vena cava entering right atrium

Question 5

What is shown in the image?

Answer 5

Right atrial appendage

Question 6

What is shown in the image?

Answer 6

Opening for coronary sinus - the route by which blood from the coronary vasculature re-enters the heart

Question 7

What is shown in the image?

Answer 7

Pulmonary veins - oxygenated blood from the lungs to the left atrium

Question 8

Blood supply to the papillary muscles of the bicuspid/ mitral valve

Answer 8

Antero-lateral muscle = LAD + circumflex

Posteromedial muscle = RCA only

The posteromedial papillary muscle is more likely to rupture following infarction because is is only supplied by the RCA