Coronary magnetic resonance angiographic image with Soap-Bubble reconstruction (approximating a shallow left anterior oblique projection rotated 45° clockwise). The left main coronary artery (black arrowhead) originates from the right sinus of Valsalva and courses within the upper ventricular septal myocardium, between the aortic root and the right ventricular outflow tract (RVOT, path no. 4). Note that the epicardial fat is suppressed (it turns black) as a result of a fat-suppression pulse used in the imaging sequence; the myocardium is gray. Both the left anterior descending (black arrow) and the left circumflex artery (double white arrowheads) also have intramyocardial courses for their proximal portions. The right coronary artery (white arrow) has a normal course within the right atrioventricular groove. Ao, aorta; LA, left atrium, RA, right atrium.
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