Anomalous coronary artery arising from the opposite sinus Coronary artery sandwich anomaly 2017-05-14T23:20:37Z Origin of the right coronary artery (RCA) from the left sinus of Valsalva or of the left main (LM) or left anterior descending (LAD) coronary artery from the right sinus of Valsalva, with the additional feature that the artery passes between the two great arteries. This carries a risk of the artery being compressed by these two vessels, Anomalous coronary artery with aortic origin and course between the great arteries Further synonyms include Anomalous origin of the coronary artery from the opposite sinus of Valsalva with an interarterial course and Anomalous origin of the coronary artery from the wrong sinus of Valsalva with a proximal course between the aorta and pulmonary artery