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Figure 4 CCTA and Schematic Drawings: Intramuscular LAD, Right Ventricular Type

Intramuscular LAD, right ventricular type (arrow). In this variant it is frequently difficult to follow the LAD on sequential axial images (A, B) because it disappears between the right ventricular trabeculae, whereas the multiplanar reformation images easily show its intraventricular course (C, D). *Interventricular septum. RV = right ventricle; other abbreviations as in Figure 1.