PMC9130801_01
Normal coronary artery connection and course contrasted with anomalous RCA. (a) Normal
coronary artery connection and course. (b) Anomalous RCA with slit-like orifice,
interaterial, and intramural course.. LAD: left anterior descending artery; LCx: left circumflex coronary artery; RCA: right
coronary artery.
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PMC9130801_01_10.1177_2050313X221100878-fig1.jpg
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CT coronary angiography identified a small, slit-like osteal orifice of the RCA connecting to the left sinus of Valsalva followed by an acute-angle takeoff (Figure 1).
Imaging from CT coronary angiography. (a) An oblique reformat demonstrates an
acute-angle takeoff of the anomalous RCA (arrowhead) as it courses interarterially. (b)
The coronal image demonstrates lateral luminal compression of the anomalous RCA (arrow).
(c) This oblique maximal intensity projection again demonstrates luminal compression
(red arrow), with distal restoration of the luminal shape and diameter (red arrow) as it
exits the intramural, interarterial portion.. Ao: aorta; PA: pulmonary artery; RCA: right coronary artery.
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PMC9130801_01_10.1177_2050313X221100878-fig2.jpg
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The RCA then takes a long interarterial course between the aorta and pulmonary artery (Figure 2).