3.1 Coronary Circulation

Question 1

What branch of the aorta do the coronary arteries come from?

Answer 1

Ascending aorta

Question 2

Describe the path of the right coronary artery

Answer 2

Runs through atrio-ventricular groove, moves posterior giving off the right marginal artery and the posterior inter-ventricular artery

Question 3

What supplies the SA and AV nodes?

Answer 3

Right coronary artery

Question 4

Describe the path of the left coronary artery

Answer 4

Moves in the left atrial-ventricular groove, then quickly splitting into the circumflex branch and anterior inter-ventricular branch. The circumflex gives off the left marginal branch.

Question 5

Where are the areas of Anastamoses?

Answer 5

Anterior interventricular and posterior interventricular arteries meet at the apex as well as where the circumflex meets the right coronary proximal to the main vessels

Question 6

If the SA node malfunctions can the heart still conduct?

Answer 6

Yes, the AV node can pace the heart by itself

Question 7

If the AV node malfunctions can the heart still conduct?

Answer 7

No, an artificial pacemaker then needs to be inserted to maintain conduction