left coronary artery


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Related to left coronary artery: right coronary artery, circumflex artery, Coronary circulation, Marginal artery

left cor·o·nar·y ar·ter·y (LCA),

[TA]
origin, left aortic sinus; distribution, it divides into two major branches, an anterior interventricular that descends in the anterior interventricular sulcus, and a circumflex branch that passes to the diaphragmatic surface of the left ventricle; gives atrial, ventricular, and atrioventricular branches.
Synonym(s): arteria coronaria sinistra [TA]

left coronary artery

one of a pair of branches from the ascending aorta, arising in the left posterior aortic sinus, dividing into the left interventricular artery and the circumflex branch, and supplying both ventricles and the left atrium. Compare right coronary artery.

left cor·o·nar·y ar·te·ry

(left kōr'ŏ-nar-ē ahr'tĕr-ē) [TA]
Origin, left aortic sinus; distribution, it divides into two major branches, an anterior interventricular, which descends in the anterior interventricular sulcus, and a circumflex branch, which passes to the diaphragmatic surface of the left ventricle; gives atrial, ventricular, and atrioventricular branches.
Synonym(s): arteria coronaria sinistra.

left coronary artery

Abbreviation: LCA
One of the two main epicardial arteries that feed the heart muscle. It originates from the left aortic sinus, a dilation in the aorta just behind one of the leaflets of the aortic valve. At the level of the junction between the atria and the ventricles, the left coronary splits into the circumflex artery, which runs to the left along the outside of the heart in the atrioventricular groove, and the left anterior descending artery, which continues down the interventricular groove. Among the heart regions it supplies are most of left atrium, the left ventricle, and the interventricular septum.
Synonym: left main coronary artery See: aorta (Branches of aorta)for illus.; heart (The heart) for illus.
See also: artery
References in periodicals archive ?
Bland-White-Garland syndrome of anomalous left coronary artery arising from the pulmonary artery: A historical review Pediatr Radiol 2007;37:890-895.
In patients with anomalous left coronary artery originating from the pulmonary artery, the time of clinical signs and symptoms varies.
After birth vascular resistance of the pulmonary artery starts to decrease and blood flow from the pulmonary artery into the left coronary artery progressively decreases.
The left coronary artery (LCA) was observed to arise from the lower part of the SJ in 58% of the patients, while in 29% of them it originated from the SJ, and in 13% of the cases it arose from the upper part of the SJ.
The authors noted that the left coronary artery arose below the sinotubular junction in 58% of the specimens, while 29% was located above the STJ and 13% arose at the STJ.
Sinoatrial node artery artery frequently has been described as a solitary artery originating from RCA, or circumflex branch of the left coronary artery and/or from the trunk of the left coronary artery (1, 9, 10, 13).
As a whole, our findings may explain the higher mortality rate of myocardial infarction in young patients by showing the majority of young patients with significant CAD having proximal left coronary artery system lesions.
On 38th hospital day, we performed coronary angiography, which demonstrated multiple giant aneurysms with sluggish blood flow on the entire RCA and a stenosis on the proximal anterior descending branch of the left coronary artery.