ECG Cardiac Anatomy 4

Question 1

Which coronary artery territory is represented by ST changes in leads II, III, and aVF?

Accepted Answer

Right coronary artery

Answer

Left anterior descending

Answer

Left circumflex

Answer

Left main coronary artery

Question 2

The sinus node (SA node) is typically located at the junction of which structures?

Accepted Answer

Superior vena cava and right atrium

Answer

Right ventricle and pulmonary artery

Answer

Left atrium and left pulmonary veins

Answer

Inferior vena cava and right atrium

Question 3

Tricuspid valve regurgitation most directly increases volume load in which chamber?

Accepted Answer

Right atrium

Answer

Left ventricle

Answer

Left atrium

Answer

Right ventricle

Question 4

Which valve is located at the origin of the pulmonary artery and prevents backflow into the right ventricle?

Accepted Answer

Pulmonic valve

Answer

Mitral valve

Answer

Aortic valve

Answer

Tricuspid valve

Question 5

The left ventricle forms which border of the heart on the standard frontal chest X-ray?

Accepted Answer

Left cardiac border

Answer

Right cardiac border

Answer

Upper cardiac border

Answer

Inferior cardiac border

Question 6

During ventricular systole, which valves are OPEN?

Accepted Answer

Aortic and pulmonic

Answer

Mitral and tricuspid

Answer

All four valves simultaneously

Answer

Mitral and aortic

Question 7

Which layer directly contacts the blood within the cardiac chambers and covers the valve leaflets?

Accepted Answer

Endocardium

Answer

Myocardium

Answer

Pericardium

Answer

Epicardium