Prognostic Value of Atherosclerotic Extent in Diabetic Patients with Nonobstructive Coronary Artery Disease

Figure 1

Schematic overview of the computed tomography angiography-derived risk score. Leiden score is calculated by the summation of segment score quantified as , i.e., a right dominant system with a noncalcified plaque with >50% stenosis in the left main segment () + a noncalcified plaque with <50% stenosis in the proximal left circumflex artery () + a calcified plaque with >50% stenosis in the right posterior descending artery (), so the Leiden score is 11.74. Segment involvement score (SIS) was calculated by the summation of the segments exhibiting plaque; in the case above, SIS is 3. CTA = computed tomography angiography; AL = anterolateral segment; D1 = diagonal 1; D2 = diagonal 2; IM = intermediate segment; LAD = left anterior descending coronary artery; LCA = left coronary artery; LCX = left circumflex coronary artery; LM = left main segment; L-PDA = left posterior descending artery; L-PL = left posterolateral segment; OM = obtuse marginal segment; RCA = right coronary artery; R-PDA = right posterior descending artery; R-PL = right posterolateral segment.