ECG Cardiac Anatomy 3

Question 1

The fossa ovalis is a remnant of which fetal structure?

Accepted Answer

Foramen ovale

Answer

Ductus venosus

Answer

Ductus arteriosus

Answer

Umbilical vein

Question 2

Which ECG lead best reflects the lateral wall of the left ventricle supplied by the left circumflex artery?

Accepted Answer

I, aVL, V5–V6

Answer

V1–V2

Answer

II, III, aVF

Answer

V3–V4

Question 3

How many pulmonary veins typically drain into the left atrium?

Accepted Answer

Four

Answer

Two

Answer

Three

Answer

Six

Question 4

The moderator band (septomarginal trabecula) is found in which cardiac chamber?

Accepted Answer

Right ventricle

Answer

Left atrium

Answer

Left ventricle

Answer

Right atrium

Question 5

Which artery is the most common culprit in anterior ST-elevation MI?

Accepted Answer

Left anterior descending artery

Answer

Right coronary artery

Answer

Left circumflex artery

Answer

Obtuse marginal artery

Question 6

Pectinate muscles are most prominent in which chamber?

Accepted Answer

Right atrium

Answer

Left ventricle

Answer

Left atrium

Answer

Right ventricle

Question 7

Which structure forms the posterior border of the heart as seen on a chest X-ray?

Accepted Answer

Left atrium

Answer

Right ventricle

Answer

Right atrium

Answer

Left ventricle