Coronary Arteries

Question 1

At what part during the cardiac cycle does most of the coronary artery antegrade flow occur?

Answer 1

Early ventricular diastole

Question 2

When does blood from the Aorta fill the coronary arteries?

Answer 2

During ventricular diastole, when the AV is closed.

During ventricular systole, AV is open and the cusps cover the openings to the arteries

Question 3

Increased HR (reduces or increases) the duration of ventricular diastole, and therefore (reduces or increases) forward flow in the coronary arteries

Answer 3

Reduces, reduces

Question 4

What does the RCA supply?

Answer 4

Both atria
IAS
RV free wall
RV apex
Posteromedial pap muscle

Question 5

What branches off of the RCA in 80% of people? What about the other 20%?

Answer 5

PDA in 80%

PDA originates off the LCx in the other 20%

Question 6

What does the PDA supply?

Answer 6

Inferior IVS
Inferior LV wall

Question 7

What does the LCA branch into

Answer 7

LAD and LCX

Question 8

What do LAD and LCX both supply?

Answer 8

Anterolateral pap muscle

Question 9

What does LAD supply?

Answer 9

Anterior septal wall
Anterior LV wall
LV apex

Question 10

What does LCX supply?

Answer 10

Inferolateral LV wall
Anterolateral LV wall