Arterial supply, venous and lymphatic drainage of the heart

Question 1

what is the heart wall supplied by

Answer 1

left and right coronary arteries and their anastomosing branches.

Question 2

where is the heart drained by

Answer 2

cardiac veins almost entirely into the coronary sinus (a wide venous channel on the posterior surface of the heart, lying just below the left atrium), which in turn feeds into the right atrium.

Question 3

what are the coronary arteries and cardiac veins are embedded in

Answer 3

the epicardium of the heart wall, usually surrounded by varying amounts of fat.

Question 4

where do the coronary arteries and vessels lie

Answer 4

in both the atrioventricular (=coronary) sulcus and the interventricular sulci (=grooves) that groove the heart wall epicardium.

Question 5

what is the location of the atrioventricular groove

Answer 5

encircles the heart between the atria and ventricles.

Question 6

what is the location of the inter ventricular groove

Answer 6

lie between the two ventricles.

Question 7

where does the anterior inter ventricular groove continue to

Answer 7

the diaphragmatic surface of the heart where it is now called the posterior interventricular groove.

Question 8

grooves of the heart wall

Question 9

where do the left and right coronary arteries arise from

Answer 9

left and right aortic sinuses

Question 10

where do the left and right coronary arteries arise from

Answer 10

left and right aortic sinuses

Question 11

In which part of the aorta (ascending aorta/ aortic arch/ descending aorta) are the aortic sinuses found?

Answer 11

Aortic root: The root is the first part of the ascending aorta, closest to the aortic valve.

It includes the aortic sinuses, which are bulb-shaped cavities from which the right and left coronary arteries arise

Question 12

What are the 2 main branches given off by the RCA?

Answer 12

• right marginal a.
• posterior interventricular a.

Question 13

What are the 2 main branches given off by the LCA?

Answer 13

• left. anterior descending a.
• circumflex a.

Question 14

The coronary arteries are “end arteries”. What is meant by the term “end artery”?

Answer 14

artery that is the only supply of oxygenated blood to a portion of tissue. Arteries which do not anastomose with their neighbors are called end arteries

Question 15

1. The anterior interventricular artery (AIV) and posterior interventricular artery (PIV) are frequently referred to by clinicians as the left anterior descending artery (LAD) and the posterior descending artery (PDA), respectively.

Question 16

cardiac veins

Answer 16

carry blood with a poor level of oxygen, from the myocardium to the right atrium.

Question 17

where do the main cardiac veins lie

Answer 17

alongside the coronary arteries in the coronary and interventricular grooves.

Question 18

where do most of the coronary veins return to

Answer 18

the right atrium through the coronary sinus.

Question 19

Heart veins that go into the coronary sinus:

Answer 19

great cardiac vein, middle cardiac vein, small cardiac vein.

Question 20

Great cardiac vein lies alongside

Answer 20

ant interventricular a.

Question 21

Middle cardiac vein

Answer 21

lies alongside post interventricular a.

Question 22

Small cardiac vein lies alongside

Answer 22

r. marginal a.

Question 23

All above(great, middle, small cardiac vein) drain into the coronary sinus .

Answer 23

lying alongside the circumflex a

Question 24

where does the coronary sinus drain into

Answer 24

right atrium

Question 25

Ant cardiac veins

Answer 25

drain directly into right atrium

Question 26

where does lymph from heart wall drain into

Answer 26

the tracheobronchial, bronchopulmonary and paratracheal lymph nodes, ie.,
the same as the lungs (see below diagram).