CV/Resp Part 3- vasculature of the heart

Question 1

Answer 1

Question 2

Answer 2

Question 4

There are two main coronary arteries which branch to supply the entire heart. They are named the __ and __ coronary arteries which are the first branches of the ascending aorta.

They arise from the left and right aortic __ within the aorta.

Answer 4

There are two main coronary arteries which branch to supply the entire heart. They are named the left and right coronary arteries which are the first branches of the ascending aorta.

They arise from the left and right aortic sinuses within the aorta.

The aortic sinuses are small openings found within the aorta behind the left and right flaps of the aortic valve. When the heart is relaxed, the back-flow of blood fills these valve pockets, therefore allowing blood to enter the coronary arteries.

Question 5

The artery which gives rise to the posterior __ branch (posterior __) defines coronary artery dominance. __ dominance is typical (67%)

Answer 5

The artery which gives rise to the posterior interventricular branch (posterior descending) defines coronary artery dominance. RCA dominance is typical (67%)

Question 6

The left coronary artery (LCA) branches off, in order:

1.

2.

3.

4.

Answer 6

1. the sinoatrial nodal branch
2. anterior interventricular branch (anterior descending branch LAD)
3. circumflex branch
4. left marginal branch.

Question 7

The LCA thus typically supplies the __ atrium, most of the __ ventricle, part of the __ ventricle, most of the __ septum including the __ bundle, and the __ node in 40% of people

Answer 7

The LCA thus typically supplies the left atrium, most of the left ventricle, part of the right ventricle, most of the interventricular septum including the AV bundle, and the SA node in 40% of pe

Question 8

Answer 8

Question 9

Answer 9

Question 10

the right coronary artery branches to form :

1. (in 60% of people)

2.

3.

4.

Answer 10

1. the sinoatial noral branch (60%)
2. atrioventricular nodal branch
3. posteiror interventricular branch (posterior descending)
4. the interventricular septal branch

Question 11

Answer 11

Question 12

Answer 12

Question 14

outline which regions the coronary arteries serve

Answer 14

Question 15

Answer 15

Question 16

The __ __ is the main vein of the heart, located on the posterior surface in the coronary sulcus, which runs between the left atrium and left ventricle.

The __ drains into the __ __. Within the right atrium, the opening of the coronary sinus is located between the right atrioventricular orifice and the inferior vena cava orific

Answer 16

The coronary sinus is the main vein of the heart, located on the posterior surface in the coronary sulcus, which runs between the left atrium and left ventricle.

The sinus drains into the right atrium.

Within the right atrium, the opening of the coronary sinus is located between the right atrioventricular orifice and the inferior vena cava orifice.

MOST VEINS DRAINING THE HEART EMPTY INTO THE CORONARY SINUS, WHICH DRAINS INTO THE RIGHT ATRIUM

Question 18

Answer 18

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21

Question 22

here are five tributaries which drain into the coronary sinus:

The anterior __ vein drains into the great cardiac vein, and drains the areas supplied by the LCA

The __ __ vein is also located on the anterior surface of the heart. This passes around the right side of the heart to join the coronary sinus. It accompanies the right marginal branch of the RCA.

Another vein which drains the right side of the heart is the __ __ vein. It is located on the posterior surface of the heart. It accompanies the __ __ branch of the RCA

__ __ cardiac veins drain the right ventricle and drain directly into the right atrium

The final 2 cardiac veins are also on the posterior surface of the heart:
• On the left posterior side is the left __ vein.

• In the centre is the left __ ventricular vein which runs along the posterior __ __ to join the coronary sinus.

Answer 22

The anterior interventricular vein drains into the great cardiac vein, and drains the areas supplied by the LCA

The small cardiac vein is also located on the anterior surface of the heart. This passes around the right side of the heart to join the coronary sinus. It accompanies the right marginal branch of the RCA.

Another vein which drains the right side of the heart is the middle cardiac vein. It is located on the posterior surface of the heart. It accompanies the posterior interventricular branch of the RCA

Small anterior cardiac veins drain the right ventricle and drain directly into the right atrium

The final 2 cardiac veins are also on the posterior surface of the heart:
• On the left posterior side is the left marginal vein.

• In the centre is the left posterior ventricular vein which runs along the posterior interventricular sulcus to join the coronary sinus.