Download Right Coronary Artery

 Arterial Supply


Right coronary artery
Left coronary artery
 Venous Drainage



Venae cordis minimis
Anterior cardiac veins
Coronary sinus
 Arterial supply
 Arterial supply
1.Right coronary artery
Origin : arise from the anterior aortic sinus
Course :
 passes between the pulmonary artery& right auricle
 it descends in the coronary sulcus till the inferior
margin of the hear
 it reaches the posterior interventricular Groove
 Branches :
1. Rt conus artery: To the conus arteriosus (infundibulub)
of right ventricle
2. ventricular branch : To the anterior and inferior
surfaces of heart
3. atrial Branches : to ant surface of Rg.atrium
4. artery to S.A node.
5. marginal artery : Runs along the inferior border
Conus brs
 Branches :
6. posterior interventricular artery :
 runs in posterior interventricular groove
 it gives:
- ventricular branches to the adjoining parts of
2 ventricles
- post 1/3 of interventricular septum
- artery to A.V node & bundle
Ventricular brs
AV nodal br
Right Coronary Artery
2. Left coronary artery
 Origin : arise from the left posterior coronary sinus
Course
:
 passes between the pulmonary root & lt auricle
 It reaches the coronary sinus where it gives ant
interventricular artery
 the main artery then curves around the lt
margin of the heart & named circumflex aretry
 The circumflex artery runs in the coronary sulcus
posteriorly till it meets the termination of right coronary
Branches :
1. Lt conus artery : To conus arteriosus
2. anterior interventricular artery:
it gives :
- ventricular branches to the
adjoining parts of 2 ventricles
- ant 2/3 interventricular septum
3. circumflex artery :
it gives :
- atrial branches to lt atrium
- ventricular branches
Left Coronary Artery
Anastomoses of the coronary arteries
 Branches of the coronary arteries are functional end arteries
 Anastomoses can occur in the following sites :
- At the apex
- In the posterior part of coronary
sulcus
- Along the interventricular septum
Branches of
Coronary arteries
12
Branches
and
anastomoses
of coronary
artries
Venous Drainage
1. Venae cordis minimis
2. Anterior cardiac veins
3. Coronary sinus
Venous Drainage
Venous Drainage :
1-venae cordis minimi : Are minute veins which lie
in the muscle wall and open directly into any chamber
2- anterior cardiac veins : Series of small veins
which runs transversely to open into the Rt atrium.
-3-4 small vein running parallel to one another on ant wall
of rt ventricle
3- coronary sinus :
It is a wide venous
channel situated in the posterior part of coronary
sulcus & ends in the Rt atrium
Tributaries of Coronary sinus:
1. Great Cardiac vein :

ascend with ant interventricular
artery then curves with the circumflex
artery to end in the coronary sinus
2. Middle cardiac vein :

accompany the posterior
interventricular artery
18
3. Small Cardiac vein :

Accompanies right marginal artery
4. Oblique Vein of Lt Atrium (of Marshall) :

Desends obliquely on the back of atrium
5. posterior vein of the Lt ventricle :
19
Oblique Vein of Lt Atrium (of Marshall)
20
1. Right atrioventricular groove:
 Right coronary artery
 Small cardiac vein
2. Left anterior atrioventricular groove:
 Left coronary artery
3. Left posterior atrioventricular groove:
 Coronary sinus
4. Anterior interventricular groove:
 Anterior interventricular artery
 Great cardiac vein
5.
Posterior interventricular groove :
 Posterior interventricular artery
 Middle cardiac vein
Cardiac Veins (Sternocostal Surface)
Anterior cardiac veins
Cardiac Veins (Diaphragmatic Surface)