Coronary Arteries & Veins

RCA- origin

right aortic sinus

RCA- course

follows coronary sulcus between atria/ventricles

RCA- supplies

R atrium, R ventricle, posterior 1/3 septum, 60% SA node, 80% AV node

RCA- anastomoses

circumflex/ anterior interventricular branches of LCA

SA nodal artery- origin

RCA near origin

SA nodal artery- course

ascends to SA node

SA nodal artery- supplies

pulmonary trunk, SA node

SA nodal artery- anastomoses

None

Right marginal artery- origin

RCA

Right marginal artery- course

inferior margin of the heart, apex

Right marginal artery- supplies

myocardium of lateral side of heart

Right marginal artery- anastomoses

anterior interventricular branch of LCA

Posterior interventricular artery- origin

RCA

Posterior interventricular artery- course

runs in posterior interventricular groove to apex

Posterior interventricular artery- supplies

posterior ventricular walls

Posterior interventricular artery- anastamoses

anterior interventricular branch of LCA

Posterior interventricular artery- supplies

posterior ventricular walls

Posterior interventricular artery- anastomoses

anterior interventricular branch of LCA (at apex)

AV nodal artery- origin

RCA near origin of posterior interventricular artery

AV nodal artery- course

passes to the AV node

AV nodal artery- supplies

AV node

AV nodal artery- anastomoses

None

Left coronary artery- origin

left aortic sinus

Left coronary artery- course

runs in AV groose, gives off anterior interventricular and circumflex branches

Left coronary artery- supplies

Left atrium, left ventricle, interventricular septum, AV bundles, AV node

Left coronary artery- anastomoses

RCA

Anterior interventricular artery- other names

left anterior descending, widowmaker

Anterior interventricular artery- origin

LCA

Anterior interventricular artery- course

runs along anterior interventricular groove to apex

Anterior interventricular artery- supplies

anterior walls of R/L ventricles, anterior 2/3 of septum

Anterior interventricular artery- anastomoses

posterior interventricular branch of RCA (at apex)

Circumflex artery- origin

LCA

Circumflex artery- course

left into AV sulcus, posterior to surface of heart

Circumflex artery- supplies

L atrium, posterior wall of L ventricle

Circumflex artery- anastomoses

RCA

Left marginal artery- origin

circumflex branch of LCA

Left marginal artery- crouse

follows left border of heart

Left marginal artery- supplies

L ventricle

Left marginal artery- anastomoses

interventricular branches

Coronary sinus- course

main vein of heart, runs L to R in posterior part of coronary sulcus

Coronary sinus- origin

great cardiac vein (from L), middle/small cardiac veins (from right)

Great cardiac vein- origin

*at this point called: anterior interventricular vein, runs with artery of same name*

begins near apex of heart

Great cardiac vein- course

ascends with anterior interventricular branch of LCA

Middle cardiac vein- drains

most of area supplied by RCA

Middle cardiac vein- runs with

posterior interventricular artery (of RCA)

Middle cardiac vein- aka

posterior interventricular vein

Small cardiac vein- runs with

right marginal branch of RCA

Small cardiac vein- drains

most of area commonly supplied by RCA

Oblique vein of L atrium- course

over posterior wall of the left atrium

Oblique vein of L atrium- anastomoses

great cardiac vein, forms coronary sinus

Anterior cardiac vein- origin

anterior surface of right ventricle

Anterior cardiac vein- course

crosses over coronary sulcus

Anterior cardiac vein- end

Right atrium

Smallest cardiac vein

minute vessels, begin in capillary beds of myocardium, open directly into chambers of heart (mostly atria)