Left circumflex arising from right coronary sinus
Congenital
coronary anomalies detected by coronary computed tomography compared to invasive coronary angiography. Volume-rendered three-dimensional reconstructions of the coronary tree and heart by CT coronary angiography in a patient presenting with previous syncope showing the circumflex artery arising from the right anterior sinus with anomalous retroaortic course.
Prevalence
and characteristics of coronary artery anomalies in an adult population undergoing multidetector-row computed tomography for the evaluation of coronary artery disease. A patient with a left circumflex artery (LCX) anomalous origin. Three-dimensional volume-rendered image shows the LCX arising separately close to the origin of the right coronary artery (RCA) from the right coronary sinus and coursing below and behind the aortic root
Prevalence
and characteristics of coronary artery anomalies in an adult population undergoing multidetector-row computed tomography for the evaluation of coronary artery disease. 3-D Volume-rendered images, shows the entire coronary system originating from right sinus of Valsalva from three separate ostia. Left anterior descending coronary artery passes anterior to the right ventricular outflow tract. Circumflex artery passes posteriorly between the left atrium and the aortic root to resume its normal position in left atrioventricular groove. The Right coronary artery has normal configuration
Left circumflex (LCx) arising from right coronary sinus (RCA) is a coronary arterial variant.
Epidemiology
It is considered the most common coronary anomaly with prevalence range of around 0.37-1.3 % of all patients.
Sub types
According to some publications, anomalous LCx is divided into 3 types
- type I: separate ostia for right coronary artery (RCA) and LCx
- type II: common ostia in the right sinus.
- type III: LCx arising as a branch of the proximal RCA.
Course
It commonly arises from a separate ostium within the right sinus, or as a proximal branch of the RCA. - i.e. left circumflex arising from right coronary artery
Significance
Although this anomaly is usually classified as benign and asymptomatic. There are occasional reports of sudden death, myocardial infarction, and angina pectoris in the absence of atherosclerotic lesions .
See also
Siehe auch:
Assoziationen und Differentialdiagnosen zu LCx arising from right coronary sinus:
LCx and LAD
arising separately from the right coronary sinus
