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HEART-LEFT CORONARY ARTERY

Anatomy-Thorax

HEART-LEFT CORONARY ARTERY

ORIGIN & COURSE
1. Arises from the left aortic sinus, behind the pulmonary trunk. The vessel emerges b/w the left auricle + infundibulum of right ventricle.
2. After a short course it divides into 2 main branches.

BRANCHES
3. Circumflex branch - continues down the back of the heart in the AV groove, giving off various ventricular branches + anatamoses at the end with the right coronary. In 40% of patients, it gives off the SA nodal artery.
4. LAD (AKA anterior interventricular a.) - runs down the IV groove to anastamose with the posterior interventricular a. branch of the right coronary under the apex. Supplies IV septum.
5. The LAD gives off several large ventricular branches (diagnoal + obtuse marginal a.) + conus branch (which anastamoses with the conus branch of the right coronary).


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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