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Figure 5: Cartoon illustrating the direction of ultrasonic waves (interrupted lines), parallel to the tissue separating aortic lumen from coronary artery lumen. Arrow shows the location of "drop-out" artifact, creating an apparent appearance of left coronary artery originating from aorta

Figure 5: Cartoon illustrating the direction of ultrasonic waves (interrupted lines), parallel to the tissue separating aortic lumen from coronary artery lumen. Arrow shows the location of