Coronary arteries are the blood vessels that supply oxygen-rich blood to the heart muscle itself. They are essential because the heart needs its own blood supply to pump effectively.
Main Coronary Arteries
- Left Coronary Artery (LCA)
- Divides into:
- Left Anterior Descending (LAD) artery – supplies the front of the left side of the heart
- Left Circumflex (LCx) artery – supplies the outer side and back of the left heart
- Divides into:
- Right Coronary Artery (RCA)
- Supplies the right side of the heart, the bottom portion of the left ventricle, and the heart’s conduction system in most people
Function
- Deliver oxygen and nutrients to the myocardium (heart muscle)
- Remove metabolic waste from heart tissue
Clinical Relevance
- Coronary artery disease (CAD): Blockage of these arteries by plaque can cause angina (chest pain) or heart attacks (myocardial infarction).
- Angioplasty or bypass surgery: Procedures often target these arteries to restore blood flow.
- Lifestyle impact: Smoking, high cholesterol, high blood pressure, diabetes, and sedentary habits increase risk of coronary artery disease.
Quick Facts
- The heart has its own circulation, separate from systemic blood flow.
- Coronary arteries are most active during diastole (heart relaxation phase).
If you want, I can make a detailed labeled diagram of the coronary arteries with common blockage sites, which is very helpful for understanding heart attacks.
Do you want me to do that?
