left circumflex artery


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left circumflex artery

Abbreviation: LCx
An artery that branches from the left main coronary artery and runs to the left, in the atrioventricular groove, i.e., the coronary sulcus, around the lateral and posterior sides of the heart. It supplies blood to portions of the left ventricle and left atrium.
Synonym: circumflex coronary artery; left circumflex coronary artery See: heart (The heart) for illus.
See also: artery
References in periodicals archive ?
This is the first case report on both conventional angiography and the MDCT images of a RCA arising from distal left circumflex artery.
Right coronary artery originating from distal left circumflex artery in a patient with an unusual type of isolated single coronary artery.
Diagnostic left coronary angiography revealed that the left ventricular apex was supplied by the left circumflex artery
The maximum diameter reduction of 8 coronary segments (left main stem, left anterior descending artery, main diagonal branch, main septal branch, left circumflex artery, main marginal branch, right coronary artery, right posterior descending branch) was scored with 1 to 4 points according to a luminal narrowing of 1% to 49% (1 point), 50% to 74% (2 points), 75% to 99% (3 points), or a total occlusion (4 points).
According to the proportional length of each vessel segment in the coronary artery tree, segments were graded with different maximum numbers of points: 5 points for the left main stem, 20 for the left anterior descending artery, 10 for the main diagonal branch, 5 for the first septal branch, 20 for the left circumflex artery, 10 for the obtuse marginal and posterolateral vessels, 20 for the right coronary artery, and 10 for the right posterior descending branch.
Coronary angiography and postmortem studies have shown that the sinoatrial node (SAN) artery originates from proximal segment of the right coronary artery (RCA) in the majority (51-59%) of the patients, and from the left circumflex artery (35-42%) or from both in the remaining small part (1-6).
It gave the left anterior descending artery (LAD) coursing to the interventricular groove and left circumflex artery (CxA) coursing to the left atrioventricular groove.
Coronary angiography (30[degrees] right anterior oblique, 35[degrees] caudal and 60[degrees] left anterior oblique projections of the left coronary system) demonstrated a rare anatomical variation, in which the sinus node artery had a long course originating from the distal part of the left circumflex artery below or behind the left auricle (Fig.