Left coronary artery: Difference between revisions
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Image:LCA.LAO_Cranial.jpg|A [[coronary angiogram]] that shows the LMCA, LAD and LCX | Image:LCA.LAO_Cranial.jpg|A [[coronary angiogram]] that shows the LMCA, LAD and LCX | ||
Image:LCA.AP_Cranial.jpg|A [[coronary angiogram]] that shows the LMCA, LAD and LCX | Image:LCA.AP_Cranial.jpg|A [[coronary angiogram]] that shows the LMCA, LAD and LCX | ||
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Revision as of 18:32, 27 August 2013
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: LCA
Overview
The left coronary artery normally arises from the aorta above the left cusp of the aortic valve. The origin of the left coronary artery is called the left main coronary artery, and it bifurcates into the left anterior descending and the left circumflex artery. This artery supplies the majority of the blood flow to the left ventricle, the pumping chamber of the heart.
Branches
The left coronary artery typically courses for 1 to 25 mm as the left main artery, and then bifurcates into the anterior interventricular artery (also called left anterior descending (LAD)) artery and the left circumflex artery (LCX).
If an artery arises from the left main between the LAD and LCX, it is known as the ramus intermedius. The ramus intermedius occurs in 37% of the general population, and is considered a normal variant.
The left coronary artery arises from the left aortic sinus. It bifurcates (divides or branches into) the Left anterior ascending artery (also known as the LAD or the anterior interventricular artery) and the Left circumflex artery (also known as the circumflex, circ, or LCX). It supplies the anterior part of the left ventricle: anterolateral myocardium, apex, anterior interventricular septum, anterolateral papillary muscle.
It supplies the posterolateral side of the left ventricle.
Segments
LCA with median ramus and marginal branches
File:LCA with median ramus.png
LCA with obtuse marginal branch
Table
Additional images
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A coronary angiogram that shows the LMCA, LAD and LCX -
A coronary angiogram that shows the LMCA, LAD and LCX -
A coronary angiogram that shows the LMCA, LAD and LCX -
A coronary angiogram that shows the LMCA, LAD and LCX -
A coronary angiogram that shows the LMCA, LAD and LCX
