Main Trunk of Left Coronary Artery: Anatomy and Clinical Implications

Purpose This study using multi-slice computed tomography (MSCT) aimed to analyse and correlate the length of the left main stem with potentially important clinical parameters that may influence treatment. Materials and Methods 1500 patients (851 men, 649 women; mean age 57.38 ± 11.03 [SD] years; age range: 5–85 years) who underwent the MSCT scans from September 2020 to March 2022 were retrospectively included. Using the syngo.via post-processing workstation, the data was used to generate 3D simulations of a coronary tree. The reconstructed images were then interpreted to assess the morphological features and variants of the coronary arteries. Means ± standard deviations and the percentages were calculated. Chi-square and Pearson correlation statistical data were also reported. Results We found a medium LMCA in 1206 (80.4%) cases, a long LMCA in 133 (8.9%) cases, and in 161 (10.7%) cases a short LMCA was observed. The average diameter of LMCA at its midpoint was 4.69 ± 0.74 mm. The most frequent type of division of LMCA was bifurcation in 1076 (71.7%) cases; in 424 (28.3%) of cases, the LMCA was divided into three or more branches. The dominance was right in 1339 (89.3%), left in 78 (5.2%), and co-dominant in 83(5.5%) cases. There was a positive correlation between the length and branching patterns of LMCA, χ2 = 113.993, P = 0.000 (＜0.05). Other variables like sex, age, diameter of LMCA, and coronary dominance did not show any significant correlation. Conclusion There is an association between the length of the left main stem and the branching characteristics of the left main stem which may be essential for the diagnosis and treatment of coronary artery patients.

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Study of Left Coronary Artery and Its Variations: A Cadaveric Study from Gujarat Region

Bhardwaj,

Shrimankar,

Trivedi

et al. 2024

Journal of the Anatomical Society of India

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Background: A lot of variations have been analyzed in the case of the left coronary artery (LCA) which makes it a leading cause of death globally. Therefore, awareness of normal and variant anatomy of this artery in relation to its main trunk and branches is the key to physicians, cardiologists, and radiologists in the management of various cardiac pathologies. Materials and Methods: Eighty embalmed and formalin-fixed adult human cadaveric hearts of both genders with no history or signs of pathology were dissected meticulously during educational hours. Results and Conclusion: Among 80 hearts studied, 71 hearts left coronary ostia were located below the sinotubular junction. The mean distance of left coronary ostia from the supravalvular ridge lying above and below was 2.93 ± 0.39 mm and 2.72 ± 0.92 mm, respectively. The mean diameter of the left coronary ostium was 3.67 ± 0.94 mm. The mean length and diameter of the LCA main trunk (LCAMT) were 13.06 ± 2.42 mm and 4.93 ± 0.60 mm, respectively. The most common branching pattern of LCAMT was bifurcation. The most frequent range of length of left anterior descending (LAD) and circumflex (Cx) artery was 10–12 cm and 6.5–8 cm, respectively. The most common termination point of LAD was at the anterior one-third part of posterior interventricular sulcus and for Cx artery was between the crux and obtuse border of the heart. Right coronary dominance was the most common.

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Main Trunk of Left Coronary Artery: Anatomy and Clinical Implications

Cited by 3 publications

References 15 publications

Multi-slice CT analysis of the length of left main coronary artery: its relation to sex, age, diameter and branching pattern of left main coronary artery, and coronary dominance

Multi-slice CT analysis of the length of left main coronary artery: its relation to sex, age, diameter and branching pattern of left main coronary artery, and coronary dominance

MSCT Analysis of the Length of Left Main Coronary Artery: Its Relation to Gender, Age, Diameter and Branching Pattern of Left Main Coronary Artery, and Coronary Dominance

Study of Left Coronary Artery and Its Variations: A Cadaveric Study from Gujarat Region

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