Dr.k.v.k---25-12-2008 Arterial supply of the heart

Blood supply of the heart by:Right and left coronary arteries (which arise from the ascending aorta)

Branches of the Right coronary artery:

-Right conus artery-Anterior ventricular branches( gives the marginal branch)-posterior ventricular branchesPosterior interventrcular (descending artery)-The atrial branches

Right & left coronary arteries

Aortic sinuses

Right coronary artery arises from right aortic sinus

Left coronary arise from left aortic sinus of the ascending part of aorta

They travel in the coronary sulcus between atria and ventricle

In a cast they look like a crown of a king (coronary)

Right&left coronary artery

Supplies- right atrium, right ventricle, part of left ventricle, SA node,AVnode,inter ventricular septom(posterior one third)

Left coronary artery supplies – anterior two third of inter ventricular septom,left atrium, left ventricle, apex

Right dominance

Left dominant coronary artery

Right&left dominance

Right dominance is the condition where the posterior inter ventricular artery arises from right coronary

Left dominance is the condition where the posterior inter ventricular branch arises from left coronary artery

Left coronary artery

Larger than the right coronary arterySupply the major part of the heartBranches:- Anterior interventricular- (descending)- -gives left diagonal artery- and left conus artery- -circumflex artery- gives left marginal artery and- Ant and post ventriclar branches

Venous drainage of heart

Most blood from the heart wall drains into the RA through the coronary sinus (which is a continuation of great cardiac vein).

Great cardiac vein:It open into the RA to the left of the inferior vena

cava

Small and middle cardiac vein

Anterior cardiac vein

Coronary sinus

Great cardiac vein begins at the apex of the heart It ascends in the interventricular groove with the

artery Coronary sinus is actually the continuation of

great cardiac vein Middle cardiac vein is located in the posterior

inter ventricular groove Small cardiac vein is located at the imagine of the

heart All three drains in to coronary sinus Coronary sinus is a dilated by venus sinus located

in the coronary sulcus between the left atrium and ventricles

Coronary sinus opens into right atrium

Clinical anatomy

Myocardial infarction means the occlusion of the artery by a thrombus

Inadequate oxygenation of the myocardium leads in to cell death

Angina is the pain due to lack of blood supply to (ischemia) heart

Coronary angio plasty: A, catheter is inserted in to the femoral artery in the thigh,aorta,arch of aorta and finally to coronary artery to widen and dilate the area of the block

Coronary artery bypass : the great saphenus vein in the lower limp used as a graft for bypass at the region of the block

THANK YOUAnd wishing New Year

Dr. k.v.kAssociate professor

25-12-2008