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Coronary Circulation

Constituted by blood vessels of the heart wall.
Myocardium own heart ciruclation to myocyte

Left Coronary Artery (LCA)

Travels though the coronary sulcus under the left auricle and divides into two brances

What are the two branches of the LCA

Anterior interventricular branch
Circumflex Branch

Anterior Interventricular branch

a.k.a. Left anterior descending (LAD)
supplies blood to both ventricles and anterior 2/3 of interventricular septum

Circumflex Branch

Gives off Left marginal branch - Furnishes blood to left ventricle
Circumflex branch ends on posterior side of heart - supplying blood to left atrium and posterior wall of left ventricle

Right Coronary Artery

Supplies Right Attrium and sinoatrial node (pacemaker). Then travels under right Auricle giving off two branches

What are the Two branches of the (RCA)

Right Marginal branch
Posterior Interventricular Branch

Right marginal Branch

from the RCA, extends toward the apex supplying lateral asper of right atrium and ventricle

Posterior Interventricular Branch

From RCA. Supplies Posterior walls of both Ventricals and posterior portion of interventricular septum
Ends by joining interventricular branch of LCA

When Does blood flow drop in coronary arteries?

when ventricles contract. All other organs are opposite

Blood flow increases in Coronary arteries when>

ventricles relax and refill. All other organs are
opposite

Coronary Venous Drainage

Blood drains directly thebesian veins intro the heart chambers, specifically RV. the follow 80% follow Right attrium

Myocardium is rain by___ Into

Great cardiac, posteior interventricular, left marginal veins, Small Cardiac V.(Anterior side), Middle Cardiac V. (Posterior side). ALL VEINS DRAIN Into CORONARY SINUS then into right atrium

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