Abstract
Aim: The aim of our study was to group the left main coronary truncus (LMCT) according to its branching structure and to determine its length, angle and diameter measurements together with LMCT’s main branches which are left anterior descending artery (LAD), circumflex artery (Cx) and intermediate artery (IA).
 Material and Methods: Between June 2019 and June 2021, coronary angiographies of 150 (female-39%, male-61%) patients were analysed by digital subtraction angiography. For each patient, the measurements of the length and diameter of the LMCT, LAD (proximal-middle-distal parts), Cx (proximal-middle-distal parts), and IA were calculated. Measurements were performed with 2-dimensional measurement technique.
 Results: The LMCT showed bifurcation pattern in 90.7% and trifurcation pattern in 9.3% of cases. The mean LMCA length and diameter were 15.9±5.7 mm and 6.0±0.9 mm, respectively. The LAD-CX angle defined as the bifurcation angle was 75.8±25.5°. The results that differed significantly between the sexes were the LMCT-LAD angle (159.2±17.8°) and the LAD-distal diameter (2.5±0.5 mm) (p
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