Dr.k.v.k 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 branches Posterior 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 artery Supply the major part of the heart Branches: - 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 YOU And wishing New Year Dr. k.v.k Associate professor