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Blood Supply of Heart -
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The blood supply of the heart is crucial for its function, ensuring it receives the oxygen and nutrients needed to pump blood effectively. The heart is primarily supplied by the coronary arteries, which originate from the ascending aorta just above the aortic valve.

Coronary Arteries -

1. Right Coronary Artery (RCA)
Origin: Right aortic sinus.
Course: Travels in the right atrioventricular (AV) groove.

Branches:
Right Marginal Artery: Supplies the right ventricle.
Posterior Descending Artery (PDA): Supplies the posterior part of the interventricular septum and the inferior walls of the ventricles.

Left Coronary Artery (LCA)
Origin: Left aortic sinus.
Divides into:
Left Anterior Descending (LAD) Artery: Travels down the anterior interventricular groove, supplying the anterior walls of both ventricles and the anterior part of the interventricular septum.

Circumflex Artery: Travels in the left atrioventricular groove, supplying the lateral and posterior walls of the left ventricle and left atrium.


Coronary Veins
Coronary Sinus: The main venous drainage of the heart, located in the posterior part of the AV groove, draining into the right atrium.
Great Cardiac Vein: Runs alongside the LAD artery.
Middle Cardiac Vein: Runs alongside the PDA.
Small Cardiac Vein: Runs alongside the RCA.
Understanding the blood supply of the heart is essential for diagnosing and managing conditions such as myocardial infarction and angina, making it a critical topic for FMGE, NEET PG, and USMLE aspirants. 🫀🔬



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