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Coronary circulation

 

Coronary Circulation


Circulation of blood in blood vessels that supply the heart muscles (myocardium).


Coronary artery


Supply oxygenated blood to heart muscles.

Coronary arteries supply oxygenated blood to heart muscle and cardiac vein drain the blood once it has been deoxygenated.

Cardiac vein

Cardiac Vein returns deoxygenated blood from myocardium to right atrium through coronary sinus.


Coronary artery and vein


Coronary artery

The arterial supply of coronary circulation is provided by right and left coronary arteries both arising from base of Aorta and encircling heart in coronary sulcus.

Heart receive its own supply of blood from coronary artery.

1. Right coronary artery , Two branches

Arises from Aorta near right cusp of Aortic valve.

A. Marginal artery, serve myocardial, lateral right side of Heart.

B. Posterior interventricular artery (posterior descending artery).

Runs to heart apex and supply posterior ventricular wall.

Together branches of right coronary artery supply right atrium and nearly all right ventricle.


2. Left coronary artery, Two branches

A. Anterior interventricular artery (left anterior descending artery)

B. Circumflex artery

Continue around left side of Heart in coronary sulcus. 

It supplies left atrum and small portion of left ventricle.


Aorta

1. Right coronary artery

Marginal artery

Left, Right

Posterior interventricular artery

2. Left coronary artery

Anterior interventricular artery

Circumflex artery


Coronary sinus and coronary veins


Coronary veins

Great cardiac vein                      Middle cardiac vein      Small cardiac vein

At carried blood from apex.                                                  Small cardiac vein is in coronary sulcus

              ..                                 Coronary Sinus.                     and drains right side of Heart.

                                                     Right Atrium  

Anterior view

Posterior view




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