Coronary Circulation

Question 1

Coronary artery branches from?

Answer 1

Ascending aorta ( they arise from right and left aortic sinuses)

Question 2

Which arteries get filled up at diastole

Answer 2

Coronary arteries

Question 3

Branches of RCA

Answer 3

R conus
Sinu-atrial nodal
Anterior ventricular
Posterior ventricular
Posterior interventricular artery

Question 4

RCA supplies right ventricle except

Answer 4

Area adjoining anterior inter ventricular sulcus

Question 5

RCA passes forward first between which 2 structures

Answer 5

Right auricle and pulmonary trunk

Question 6

After passing the pulmonary trunk and R auricle the RCA descends through which groove

Answer 6

Anterior coronary sulcus

Question 7

Describe the path of RCA after passing the inferior margin of heart

Answer 7

turns posteriorly and continues in posterior part of
coronary groove on diaphragmatic surface of
heart.

Question 8

LCA first passes between which 2 structures

Answer 8

Left auricle and pulmonary trunk

Question 9

The first division of LCA gives rise to

Answer 9

anterior interventricular + a circumflex artery.

Question 10

Describe the path of left anterior interventricular artery

Answer 10

runs downwards in anterior interventricular
groove to apex of heart.

Question 11

Describe the path of circumflex artery

Answer 11

circumflex artery (represents
continuation of LCA) turns round left
border of heart and continues in
posterior part of coronary sulcus to
anastomose with branches of RCA.

Question 12

Which LCA branch is found in posterior coronary sulcus

Answer 12

Circumflex artery

Question 13

Left marginal artery originates from

Answer 13

circumflex artery

Question 14

reach apex, supplies both ventricles, interventricular septum + atrioventricular(AV) node (90% of cases).
Which artery

Answer 14

RCA

Question 15

Posterior ventricular RCA supplies

Answer 15

2 in number supply
diaphragmatic (inferior) wall of right ventricle

Question 16

Largest coronary artery

Answer 16

right marginal artery is
largest and run along lower border to reach the apex.
***Originates for anterior ventricular RCA

Question 17

Right conus branch supply

Answer 17

infundibulum + upper
part of anterior wall of right ventricle

Question 18

anterior two-third of interventricular
septum are supplied by?

Answer 18

LCA

Question 19

Most of the left atrium and Most of left ventricle are supplied by

Answer 19

LCA

Question 20

RCA supplies which atrium

Answer 20

right atrium, and part of left atrium.

Question 21

RCA supply for ventricles

Answer 21

Most of right ventricle (except area adjoining anterior

atrioventricular sulcus).
#A portion of inferior wall of left ventricle (adjacent to
posterior atrioventricular sulcus).

Question 22

posteroinferior one-third of interventricular septum is supplied by

Answer 22

RCA

Question 23

Name LCA branches

Answer 23

✓ Left conus branch.
✓ Anterior interventricular artery.
✓ The circumflex artery
✓ Left marginal artery (from circumflex)
descends along left border of heart to
reach apex.
✓ Unnamed branches to left atrium and
ventricle.

Question 24

Cardiac dominance is detriment through ?

Answer 24

artery which gives rise to posterior interventricular artery

Question 25

When is it possible to say that the cardic dominance is RIght

Answer 25

If posterior interventricular artery is a branch of RCA, coronary circulation is "right dominant".

Question 26

Percent of right dominance

Answer 26

70%

Question 27

Percent of combined dominance

Answer 27

20%

Question 28

Which oddity has 10% dominance

Answer 28

Left

Question 29

For 65% cases SAnod is supplied by

Answer 29

RCA

Question 30

AV node and bundle of his are supplied by

Answer 30

90% of cases RCA

Question 31

Does LCA supply left branch of bundle of His

Answer 31

Yes

Question 32

Describe the pathogenesis of Angina Pectoris

Answer 32

Atherosclerosis/ thrombosis ➡️narrowed arteries ➡️Myocardial Ischemia➡️chest pain➡️progression to myocardial infarction

Question 33

Time in it for necrosis to occur in heart attack

Answer 33

20 to 30 minutes after occlusion

Question 34

Describe the space which coronary sinus occupies

Answer 34

Occupy coronary sulcus between left atrium and left ventricle

Question 35

Venus drained of the heart is mostly through

Answer 35

Coronary Sinus

Question 36

Describe the birth of a great cardiac vein

Answer 36

begins at apex of heart. It ascends in anterior interventricular sulcus; then curves to left and continues onto posterior surface of heart. Here, it gradually enlarges to form coronary sinus

Question 37

Where does the middle cardic vein ascend ?

Answer 37

posterior interventricular sulcus toward coronary sinus.

Question 38

Describe the location of Posterior vein of Left ventricle

Answer 38

located on posterior surface of left ventricle. It lies to left of middle cardiac vein and empties into coronary sinus.

Question 39

Small Cardiac Vein path

Answer 39

runs in posterior part of coronary groove between right atrium + ventricle and opens into end of the coronary sinus.