LCx and LAD arising separately from the left coronary sinus
Last revised by Ali Alsmair on 29 Dec 2021
Citation, DOI, disclosures and article data
Citation:
Hacking C, Alsmair A, Jones J, et al. LCx and LAD arising separately from the left coronary sinus. Reference article, Radiopaedia.org (Accessed on 28 Nov 2023) https://doi.org/10.53347/rID-38339
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rID:
38339
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Disclosures:
At the time the article was created Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosuresLast revised:
29 Dec 2021, Ali Alsmair
Disclosures:
At the time the article was last revised Ali Alsmair had no recorded disclosures.
View Ali Alsmair's current disclosuresRevisions:
8 times, by 7 contributors - see full revision history and disclosures
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Synonyms:
- Absent left main trunk
- Split origination of LCA
- Absent LMCA
- Separate origin of LCx and LAD from the left coronary sinus
- Separate origin of circumflex and left anterior descending artery from the left coronary sinus
- Absent left main stem coronary artery
One of the anatomical variants of coronary artery origin comprises the left circumflex coronary artery (LCx) and left anterior descending coronary artery (LAD) arising separately from the left coronary sinus. Hence there is no common left main coronary artery (LCA/LMCA).
It considered the commonest coronary arterial variant with a reported incidence of around 0.41-0.67% 1-2.
It is a benign anomaly that causes no hemodynamic impairment or ischemic consequences as there is no vascular compression and the proximal courses are normal. This variant is asymptomatic.
References
- 1. Villa A, Sammut E, Nair A, Rajani R, Bonamini R, Chiribiri A. Coronary Artery Anomalies Overview: The Normal and the Abnormal. WJR. 2016;8(6):537. doi:10.4329/wjr.v8.i6.537
- 2. Kastellanos S, Aznaouridis K, Vlachopoulos C, Tsiamis E, Oikonomou E, Tousoulis D. Overview of Coronary Artery Variants, Aberrations and Anomalies. WJC. 2018;10(10):127-40. doi:10.4330/wjc.v10.i10.127
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Related articles: Pathology: Vascular: Congenital coronary artery anomalies
-
congenital coronary artery anomalies
- absent coronary artery
- absent circumflex artery
- absent right coronary artery
- absent left anterior descending artery
- absent left main trunk (split origination of LCA)
- coronary hypoplasia
- ectopic origin
- anomalous left coronary artery off the pulmonary artery (ALCAPA)
-
anomalous aortic origin of coronary artery
- origination of a coronary artery from the opposite sinus (ACAOS)
- single coronary artery
- LCA or RCA (or a branch of either artery) arising from the non-coronary sinus
- LCx and LAD arising separately from the left coronary sinus
- anomalous location of coronary ostia
- from sinotubular junction
- from ascending aorta
- split artery origins
- anomalous course of coronary arteries
- absent coronary artery
- anomalies of intrinsic coronary arterial anatomy
- congenital ostial stenosis or atresia (LCA, LAD, RCA, Cx)
- coronary ostial dimple
- coronary ectasia or aneurysm
- intramural coronary artery (myocardial bridging)
- subendocardial coronary course
- coronary crossing
- anomalous origin of posterior descending artery (PDA) from the anterior descending branch or a septal penetrating branch
- dual right coronary artery
- dual left anterior descending artery
-
anomalies in coronary arterial termination
- inadequate arteriolar/capillary ramifications
- presence of fistulation from terminal coronary arteries to various structures (coronary arteriovenous fistula)
- extracardiac termination
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