“…Extent score was thus defined as the sum of individual segment scores. Coronary atherosclerosis severity was assessed using the Gensini score, which grades the narrowing of coronary artery lumens as: 1 for 1–25% narrowing, 2 for 26–50%, 4 for 51–75%, 8 for 76–90%, 16 for 91–99%, and 32 for total occlusion [21]. This score was then multiplied by a factor that reflects the importance of the lesion in the coronary arterial tree.…”