Figure 2

Example of the selection of the perfusion territories as retrospectively defined by angiography. On the left side (a) the polar map (three short axis slices, 16 segment model) with the segments included in the analysis according to angiography. The letters on the polar map correspond to those on the angiographic images. Segments marked with an "x" were not used for analysis, as care was taken to include segments with a very high probability of being supplied by the vessel/graft only. The proximal LAD (b) was not included for analysis, as the basal short axis view is planned to exclude the left ventricular outflow tract and may therefore not include the very basal anterior wall. The anterolateral segments (apical and medial) were not included due to the lack of visible distal diagonal branches. There is a large right coronary artery without significant stenosis (c), the LIMA graft on the distal LAD (d) and a venous bypass on a marginal branch (e).