Blood supply of heart

The blood supply of the heart is provided by the coronary arteries, which are the first branches of the aorta.

 Main Coronary Arteries:

1. Right Coronary Artery (RCA):

Origin: Right aortic sinus

Supplies:

 Right atrium

Most of right ventricle

Part of left ventricle (inferior surface)

SA node (60% of people)

AV node (80% of people)

 Posterior part of interventricular septum

2. Left Coronary Artery (LCA):

Origin: Left aortic sinus

Divides into:

Left Anterior Descending (LAD) artery

Left Circumflex (LCx) artery

• LAD (Anterior Interventricular artery):

Anterior wall of left ventricle

Anterior 2/3 of interventricular septum

Apex of the heart

• LCx:

Lateral and posterior part of the left ventricle

Left atrium

SA node (40% of people)

 Venous Drainage:

Main vein: Coronary sinus

Drains into the right atrium

Recieve from:

Great cardiac vein

Middle cardiac vein

Small cardiac vein

Raiyyan Tahsan Date:-09-07-2025 Wednesday Time:-08-28-23 Pm