Figure 5  .

(A) This "laid back" view from case 3 shows two vessels in parallel, passing anterosuperiorly. (B) The straight lateral view separates these vessels into a large preventricular branch and a small aberrant anterior interventricular artery. (C) The intraoperative view confirms the findings. The aberrant anterior interventricular artery (black arrowheads) passes across the subpulmonary infundibulum, whereas the preventricular branch passes some distance away from the ventriculo-arterial junction. The left coronary artery also gives rise to an accessory anterior interventricular artery (black on white arrowheads). Ao, aorta; AIV, anterior interventricular artery; aAIV, aberrant anterior interventricular artery; PT, pulmonary trunk; PVB, preventricular branch; RCA, right coronary artery.