Coronary Artery

Question 1

Right coronary artery

Question 2

Origin

Answer 2

anterior aortic sinus of ascending aorta.

Question 3

Course

Answer 3

1 first passes forwards

Between pulmonary trunk and the right auricle.

Question 4

Course

Answer 4

2 It passes vertically downwards in the atrio-ventricular groove.

Question 5

Course

Answer 5

Runs backwards
Reach posterior inter-
ventricular groove.

Question 6

Terminate

Answer 6

anastomosing with the circumflex

branch of left coronary artery

Question 7

Branches of RCA

Answer 7

Right conus artery
SA nodal artery
Right marginal artery
Posterior inter-ventricular branch
Arterial branches 
Ventricular branches

Question 8

Right conus artery

Answer 8

It forms arterial circle around pulmonary trunk
Circle is called ”annulus of
Vieussens”.

Question 9

Atrial branches

Answer 9

Branches are anterior posterior and lateral

Question 10

SA nodal branch

Answer 10

arises from right coronary artery in 60%

cases.

Question 11

Ventricular branches

Answer 11

anterior and posterior

Question 12

Area of distribution

Answer 12

Right atrium

Ventricles
Greater part of rv
Small part of lv

Whole of the conducting system
Except left branch of AV bundle

Question 13

left coronary artery

Question 14

Origin

Answer 14

left posterior aortic sinus of ascending aorta.

Question 15

Course

Answer 15

1 first run between
pulmonary trunk and the left auricle

Here it gives anterior interventricular
branch

Question 16

Terminate

Answer 16

anastomosing with the right coronary artery.

Question 17

Branches

Answer 17

Anterior interventricular branch

Circumflex branch

Question 18

Anterior interventricular branch

Answer 18

Anterior ventricular branch
Septal branch
Left Conus artery

Question 19

Circumflex branches

Answer 19

Left margin Artery
Ventricle branches
atrial branch

Question 20

Area of distribution

Answer 20

Left atrium

Ventricle
Greater part of left ventricle
Small part of right ventricle

left branch of AV bundle