ARTERIAL SUPPLY OF HEART

RCA:Right Coronary Artery
• Arises from anterior aortic sinus. It goes almost vertically in right AV groove crosses the inferior border of heart to continue posteriorly and anastomose with LCA
• It supplies RA, RV and parts of LA and LV and AV septum
BRANCHES are

- Right conus artery
- Anterior ventricular branches. The marginal branch is largest and reach upto apex
- Posterior ventricular branches
- Posterior inter ventricular artery: runs towards apex and gives branches to right and left vemtricles. It supplies the posterior part of ingter ventricular septum but NOT TO THE APEX. A large septal branch supplies AV node
- Atrial branches. Branch to SA node supplies SA node and right and left atria

LCA:Left Coronary Artery
• Usually larger than RCA and supplies the major part of heart.
• Supplies greater part of LA, LV and interventricular septum
BRANCHES are

- Anterior interventricular artery( in most of the people it supplies the APEX of heart) left diagonal artery is major branch
- Circumflex artery. Left marginal art is major branch

SUPPLY OF CONDUCTIVE SYSTEM
• SA node, AF node AV bundle are supplied by RCA
• RBB is supplied by LCA(right is wrongO
• LBB is supplied by both LCA and RCA(left doghla hota hai )

SUMMARY:
• RCA supplies all of RV(except for small area to the right of anterior nterventricular groove), variable part of diaphragmatic surface of LV, posteroinferior 3rd of ventricular septum, RA, part of LA, SA node and AV node. Small branches to LBB are also given
• LCA supplies most of LV, small area of RV to the right of Interventricular groove, anterior 2/3rd of ventricular septum, most of LA, RBB, and LBB