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Coronary Artery Anatomy
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Marginal Artery
Supplies the surface of the right ventricle; occlusion may cause right ventricular MI or damage.
Intermediate Artery (Ramus or Intermediate Branch)
Supplies blood to portions of the left ventricle; occlusion effects and symptoms can vary widely.
Left Circumflex Artery (LCx)
Supplies the left atrium and the side and back of the left ventricle; occlusion may lead to lateral or inferolateral MI.
Right Coronary Artery (RCA)
Supplies right atrium, right ventricle, bottom portion of both ventricles and back of the septum; occlusion can lead to right ventricular infarction or inferior MI.
Left Anterior Descending Artery (LAD)
Supplies the front and bottom of the left ventricle and the front of the septum; may lead to a myocardial infarction commonly known as 'anterior wall MI' if occluded.
Septal Branches
Supply the interventricular septum; occlusion may result in a septal MI.
Diagonal Branch
Supplies the anterolateral myocardium; occlusion can result in anterolateral MI.
Obtuse Marginal Artery (OM)
Supplies blood to the lateral wall of the left ventricle; occlusion can cause lateral wall MI.
Posterior Descending Artery (PDA)
Supplies the bottom of both ventricles and the back of the septum; occlusion can lead to infero-posterior MI.
Left Main Coronary Artery (LMCA)
Supplies blood to the left side of the heart; can result in widespread heart damage and sudden cardiac death if occluded.
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