open access

Vol 82, No 4 (2023)
Original article
Submitted: 2022-09-22
Accepted: 2022-11-12
Published online: 2022-11-29
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A coronary computed tomography angiography study on anatomical characteristics of the diagonal branch of anterior interventricular artery

D.-Q. Zhang12, Y.-F. Xu2, Y.-P. Dong2, S.-J. Yu12
·
Pubmed: 36472396
·
Folia Morphol 2023;82(4):822-829.
Affiliations
  1. Hebei Medical University, Shijiazhuang, China
  2. Department of Diagnostic CT, Cangzhou Central Hospital, Cangzhou, China

open access

Vol 82, No 4 (2023)
ORIGINAL ARTICLES
Submitted: 2022-09-22
Accepted: 2022-11-12
Published online: 2022-11-29

Abstract

Background: This study investigated the anatomical characteristics of the ramus
intermedius (RI) and its correlation with the proximal diameter of the branch
vessels of the left coronary artery (LCA) using coronary computed tomography
angiography (CCTA).
Materials and methods: We screened patients who underwent CCTA from January
to September 2021 and randomly enrolled 267 with RI (RI group) and 134
without RI (control group). We evaluated the anatomical features of RI (distribution,
proximal diameter, length). We measured the proximal diameter of the anterior
interventricular branch of the left coronary artery (LAD) and the circumflex branch
of the left coronary artery (LCX). We compared the differences between groups
in the proximal diameter of LAD and LCX and the correlation between gender
and each parameter of the LCA (LAD, LCX, RI) within the RI group. In addition,
we compared the correlation between the distribution characteristics of RI and
the proximal diameter of LAD and LCX within the RI group.
Results: The LAD and LCX proximal diameters in the RI group were significantly
smaller than those in the control group (p < 0.05). Comparisons within the RI
group showed the following results: the RI distribution, RI diameter and length,
and the LCX proximal diameter were not significantly different between male
and female patients (p > 0.05), and the LAD proximal diameter was significantly
larger in male than in female patients (p < 0.05). There were statistically significant
differences in the LAD and LCX proximal diameters between the different
RI distribution groups (p < 0.05). Based on the pairwise comparison, there were
significant differences in the LAD (LCX) proximal diameter between the RI-beside-
-the-LAD (LCX) group and the RI-middle group, as well as between the RI-beside-
-the-LAD (LCX) group and the RI-beside-the-LCX (LAD) group (p < 0.05).
Conclusions: A CCTA accurately evaluated the anatomical characteristics of an
RI, which has an impact on the proximal diameter of the branch vessels of the
LCA (i.e. LAD and LCX), the degree of influence of which is correlated with the
RI distribution.

Abstract

Background: This study investigated the anatomical characteristics of the ramus
intermedius (RI) and its correlation with the proximal diameter of the branch
vessels of the left coronary artery (LCA) using coronary computed tomography
angiography (CCTA).
Materials and methods: We screened patients who underwent CCTA from January
to September 2021 and randomly enrolled 267 with RI (RI group) and 134
without RI (control group). We evaluated the anatomical features of RI (distribution,
proximal diameter, length). We measured the proximal diameter of the anterior
interventricular branch of the left coronary artery (LAD) and the circumflex branch
of the left coronary artery (LCX). We compared the differences between groups
in the proximal diameter of LAD and LCX and the correlation between gender
and each parameter of the LCA (LAD, LCX, RI) within the RI group. In addition,
we compared the correlation between the distribution characteristics of RI and
the proximal diameter of LAD and LCX within the RI group.
Results: The LAD and LCX proximal diameters in the RI group were significantly
smaller than those in the control group (p < 0.05). Comparisons within the RI
group showed the following results: the RI distribution, RI diameter and length,
and the LCX proximal diameter were not significantly different between male
and female patients (p > 0.05), and the LAD proximal diameter was significantly
larger in male than in female patients (p < 0.05). There were statistically significant
differences in the LAD and LCX proximal diameters between the different
RI distribution groups (p < 0.05). Based on the pairwise comparison, there were
significant differences in the LAD (LCX) proximal diameter between the RI-beside-
-the-LAD (LCX) group and the RI-middle group, as well as between the RI-beside-
-the-LAD (LCX) group and the RI-beside-the-LCX (LAD) group (p < 0.05).
Conclusions: A CCTA accurately evaluated the anatomical characteristics of an
RI, which has an impact on the proximal diameter of the branch vessels of the
LCA (i.e. LAD and LCX), the degree of influence of which is correlated with the
RI distribution.

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Keywords

ramus intermedius, bifurcation angle, coronary computed tomography angiography

About this article
Title

A coronary computed tomography angiography study on anatomical characteristics of the diagonal branch of anterior interventricular artery

Journal

Folia Morphologica

Issue

Vol 82, No 4 (2023)

Article type

Original article

Pages

822-829

Published online

2022-11-29

Page views

670

Article views/downloads

436

DOI

10.5603/FM.a2022.0100

Pubmed

36472396

Bibliographic record

Folia Morphol 2023;82(4):822-829.

Keywords

ramus intermedius
bifurcation angle
coronary computed tomography angiography

Authors

D.-Q. Zhang
Y.-F. Xu
Y.-P. Dong
S.-J. Yu

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