同: LCX

WordNet

toward or on the left; also used figuratively; "he looked right and left"; "the political party has moved left"
a turn toward the side of the body that is on the north when the person is facing east; "take a left at the corner"
the hand that is on the left side of the body; "jab with your left" (同)left_hand
those who support varying degrees of social or political or economic change designed to promote the public welfare (同)left wing
location near or direction toward the left side; i.e. the side to the north when a person or object faces east; "she stood on the left"
intended for the left hand; "I rarely lose a left-hand glove" (同)left-hand
being or located on or directed toward the side of the body to the west when facing north; "my left hand"; "left center field"; "the left bank of a river is bank on your left side when you are facing downstream"
of or belonging to the political or intellectual left
a major thoroughfare that bears important traffic
a blood vessel that carries blood from the heart to the body (同)arteria, arterial blood vessel
a diacritical mark (^) placed above a vowel in some languages to indicate a special phonetic quality

PrepTutorEJDIC

leaveの過去・過去分詞
《名詞の前にのみ用いて》『左の』,左方の / 《しばしばl-》(政治上の)左翼の,左派の,革新派の / 左に,左方に / 《通例 the ~》『左』,左方,左側 / 《しばしばthe L-》左翼の政党(団体),左派 / 〈U〉(野球で)左翼,レフト(left field);〈C〉左翼手(left fielder) / 〈C〉(ボクシングで)左手打ち
動脈 / (道路・水路・鉄道などの)勘線,(通信の)主チャンネル
曲折アクセント記号(音質・音量・アクセントなどを示すため母音字の上につける^などの記号;role)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/11/30 15:19:04」(JST)

wiki en

The "LCX", or left circumflex artery (or circumflex artery, or circumflex branch of the left coronary artery) is an artery of the heart.

Course

It 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. There have been multiple anomalies described, for example the left circumflex having an aberrant course from the right coronary artery.^[1]

Branches

The circumflex artery curves to the left around the heart within the coronary sulcus, giving rise to one or more left marginal arteries (also called obtuse marginal branches (OM)) as it curves toward the posterior surface of the heart. It helps form the posterior left ventricular branch or posterolateral artery. The circumflex artery ends at the point where it joins to form to the posterior interventricular artery in 15% of all cases, which lies in the posterior interventricular sulcus. In the other 85% of all cases the posterior interventricular artery comes out of the right coronary artery.^[2] When the left circumflex supplies the posterior descending artery in those 15% of cases, it is known as a left dominant circulation.

Structures supplied

The LCX supplies the posterolateral left ventricle 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.)

Additional images

Coronary arteries (labeled in red text) and other major landmarks (in blue text). Left circumflex artery is labeled at right.

Cardiac vessels
Human heart with coronary arteries
Heart coronary territories
Heart left lateral coronaries diagram

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

^ PAGE, H. L.; ENGEL, H. J.; CAMPBELL, W. B.; THOMAS, C. S. (1 October 1974). "Anomalous Origin of the Left Circumflex Coronary Artery: Recognition, Angiographic Demonstration and Clinical Significance". Circulation 50 (4): 768–773. doi:10.1161/01.CIR.50.4.768.
^ Agur, Keith L. Moore, Arthur F. Dalley, Anne M.R. (2010). Clinically oriented anatomy (6th ed.). Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. p. 145. ISBN 9780781775250.

External links

Anatomy figure: 20:03-03 at Human Anatomy Online, SUNY Downstate Medical Center - "Anterior view of the heart."
Anatomy figure: 20:04-01 at Human Anatomy Online, SUNY Downstate Medical Center - "Posterior view of the heart."
Anatomy photo:20:09-0104 at the SUNY Downstate Medical Center - "Heart: The Left Coronary Artery and its Branches"
-442892231 at GPnotebook
Image at merck.com
Overview and diagrams at cardiologysite.com

This cardiovascular system article is a stub. You can help Wikipedia by expanding it.

UpToDate Contents

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English Journal

Impact of Reconstruction Algorithms and Gender-Associated Anatomy on Coronary Calcium Scoring with CT: An Anthropomorphic Phantom Study.

Li Q1, Liu S2, Myers KJ3, Gavrielides MA3, Zeng R3, Sahiner B3, Petrick N3.
Academic radiology.Acad Radiol.2016 Dec;23(12):1470-1479. doi: 10.1016/j.acra.2016.08.014. Epub 2016 Sep 22.
RATIONALE AND OBJECTIVES: Different computed tomography imaging protocols and patient characteristics can impact the accuracy and precision of the calcium score and may lead to inconsistent patient treatment recommendations. The aim of this work was to determine the impact of reconstruction algorith
PMID 27665673

Iatrogenic Lesion of an Anomalous Circumflex Coronary Artery During Mitral Surgery.

Lopez-Marco A1, Syed A2, Combellack T2, Mehta D2.
The Annals of thoracic surgery.Ann Thorac Surg.2016 Dec;102(6):e525-e527. doi: 10.1016/j.athoracsur.2016.05.029.
A patient with anomalous coronary circulation presented with non-ST segment elevation myocardial infarction and ischemic mitral regurgitation and underwent mitral valve repair and coronary revascularization. An unexpected tear occurred in the roof of the left atrium, and its subsequent repair caused
PMID 27847072

Culprit lesion location and outcome in patients with cardiogenic shock complicating myocardial infarction: a substudy of the IABP-SHOCK II-trial.

Fuernau G1,2,3, Fengler K4, Desch S5,6, Eitel I5,6, Neumann FJ7, Olbrich HG8, de Waha A9, de Waha S5,6, Richardt G10, Hennersdorf M11, Empen K12, Hambrecht R13, Jung C14, Böhm M15, Pöss J5,6, Strasser RH16, Schneider S17, Ouarrak T17, Schuler G4, Werdan K18, Zeymer U17, Thiele H5,6.
Clinical research in cardiology : official journal of the German Cardiac Society.Clin Res Cardiol.2016 Dec;105(12):1030-1041. Epub 2016 Jul 4.
BACKGROUND: In myocardial infarction without cardiogenic shock (CS), the affected coronary vessel has significant influence on the final infarct size and patient prognosis. CS data on this relation are scarce. The objective of this study was to determine the prognostic relevance of the culprit lesio
PMID 27378612

Japanese Journal

Pathological analyses of very long-term sirolimus-eluting stent implantation in human coronary artery

Imai Masao,Kimura Takeshi,Tazaki Junichi,Yamamoto Erika,Inoue Katsumi
Journal of Cardiology Cases 8(5), 145-147, 2013-11
… A 73-year-old man underwent sirolimus-eluting stent (SES) implantation for chest pain on exertion with left anterior descending coronary artery (LAD) and left circumflex coronary artery (LCX). …
NAID 120005341899

症例回旋枝および左前下行枝にステント留置5ヵ月後,左主幹部遠位部に狭窄をきたした1例

三次実
日本心血管インターベンション治療学会誌 5(1), 33-38, 2013-03
NAID 40019630676

Occlusion of left main coronary artery during percutaneous coronary intervention for chronic total occlusion of left circumflex artery with retrograde approach

Ino Yasushi,Toyoda Yasuaki,Ishii Shuuta [他]
Cardiovascular intervention and therapeutics 28(1), 81-86, 2013-01
NAID 40019580129

「左回旋枝」

Circumflex branch of left coronary artery
	Base and diaphragmatic surface of heart. (Circumflex branch not visible, but would be near the coronary sinus.)
	Base of ventricles exposed by removal of the atria. (Circumflex branch not visible, but bifurcation of left coronary artery visible at left.)
Details
Latin	Ramus circumflexus arteriae coronariae sinistrae
Source	Left coronary artery
Branches	Left atrial branch; left marginal artery; posterolateral artery; sinuatrial nodal artery (in some people); posterior interventricular artery (in some people)
Supplies	Posterolateral left ventricle, anterolateral papillary muscle, the sinoatrial nodal artery in 38% of people.
Identifiers
Gray's	p.547
Dorlands; /Elsevier	r_02/12689380
TA	A12.2.03.206
FMA	3895
	Anatomical terminology