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Blood Supply of the heart

The muscles of the heart are supplied by the

Left coronary artery : -

Arises from the root of aorta

From the left aortic sinus

It gives off the following branches

1. circumflex artery

2. oblique marginal

3. diagonals

4. left anterior descending

Right coronary artery : -

Arises from the root of aorta

From the right aortic sinus

It gives off the following branches

1. Acute marginal

2. Posterior descending

Applied anatomy : -

Blocked by atherosclerosis causes ischaemic pain - angina pectoris - chest pain

Complete block may lead to death of the heart muscle - infarction

Ischaemia of the papillary muscle may cause - regurgitation of the blood into the atrium

Block is studied by coronary angiogram