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Artery: Circumflex branch of left coronary artery
Image:Gray491.png
Base and diaphragmatic surface of heart. (Circumflex branch not visible, but would be near the coronary sinus.)
Image:Gray495.png
Base of ventricles exposed by removal of the atria. (Circumflex branch not visible, but bifurcation of left coronary artery visible at left.)
Latin	ramus circumflexus arteriae coronariae sinistrae
Gray's	subject #142 547
Source	left coronary artery
Branches	left atrial branch left marginal artery sinuatrial nodal artery (in some people)
Dorlands/Elsevier	r_02/12689380

The "LCX", or left circumflex artery (or circumflex artery, or circumflex branch of the left coronary artery) follows the left part of the coronary sulcus, running first to the left and then to the right, reaching nearly as far as the posterior longitudinal sulcus.

It gives off obtuse marginal branches (OM).

[edit] Structures supplied

The LCX supplies the posterolateral LV and the anterolateral papillary muscle.

It also supplies the sinoatrial nodal artery in 38% of people.

It supplies 15-25% of the left ventricle in right-dominant systems. If the coronary anatomy is left-dominant, the LCX supplies 40-50% of the left ventricle. (See Coronary circulation for description of dominance.)

[edit] External links

• SUNY Figs 20:03-03 - "Anterior view of the heart."
• SUNY Figs 20:04-01 - "Posterior view of the heart."
• SUNY Labs 20:09-0104 - "Heart: The Left Coronary Artery and its Branches"
• GPnotebook -442892231
• Dictionary at eMedicine circumflex+branch+of+left+coronary+artery
• Image at merck.com
• Overview and diagrams at cardiologysite.com

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

Arteries of thorax, abdomen, and pelvis edit

pulmonary - aorta - ascending aorta right coronary (sinuatrial nodal, atrioventricular nodal, atrial, right marginal, posterior interventricular) left coronary (anterior interventricular, left circumflex, left marginal) aortic arch - brachiocephalic - thyreoidea ima - common carotid | (Gray's s141-Gray's s143) DESCENDING AORTA / THORACIC AORTA: bronchial - esophageal - posterior intercostal - subcostal | (Gray's s153) ABDOMINAL AORTA: Anterior - celiac: left gastric splenic: pancreatic branches (arteria pancreatica magna) - short gastric - left gastro-omental common hepatic: proper hepatic (cystic), right gastric, gastroduodenal (right gastro-omental, superior pancreaticoduodenal) superior mesenteric: inferior pancreaticoduodenal - intestinal - ileocolic (appendicular) - right colic - middle colic inferior mesenteric: left colic - sigmoid - superior rectal Posterior - Visceral: middle suprarenal - renal (inferior suprarenal) - testicular/ovarian - Parietal: inferior phrenic (superior suprarenal) - lumbar - median sacral Terminal branches: common iliac - marginal - internal iliac | (Gray's s154) INTERNAL ILIAC: Anterior: umbilical (superior vesical, to ductus deferens) - inferior vesical - middle rectal - uterine (azygos of the vagina) - vaginal - obturator internal pudendal: (inferior rectal, perineal, artery of the urethral bulb, urethral, deep artery of the penis, dorsal artery of the penis) inferior gluteal (accompanying of ischiadic nerve, crucial anastomosis) Posterior: iliolumbar - lateral sacral - superior gluteal | (Gray's s155) EXTERNAL ILIAC: inferior epigastric (cremasteric) - deep circumflex iliac | (Gray's s156)