Abstract
Purpose
To estimate the prevalence of the left-sided aortic arch (LSAA) variants, and the effect of possible moderators on variants’ detection.
Methods
A systematic online literature search was conducted. The pooled prevalence with 95% confidence intervals was estimated for the typical and atypical branching patterns to compare the overall proportions of different variants. Meta-regression analyses were performed to investigate the effect of the subjects’ gender and geographical region, and the multidetector computed tomography (MDCT) scanner’s technology on the estimated prevalence.
Results
In total, 18,075 cases from 23 imaging studies were included and 33 different LSAA variants were detected. The estimated heterogeneity was statistically significant. Based on the estimated prevalence, approximately 77% of the population is expected to have the typical branching anatomy with sequence brachiocephalic trunk—left common carotid artery—left subclavian artery, and 23% variant branching patterns. Approximately 71%, 23%, 2%, and 0.1% of the atypical populations are expected to have two, four, three, and five emerging branches, respectively. The meta-regression analyses showed that the number of detector rows of the MDCT scanner, and the subjects’ geographical region are statistically significant moderators of the estimated prevalence.
Conclusion
The current findings indicate that the prevalence of the LSAA variant branching anatomy is significantly affected by the subjects’ geographical region and the MDCT scanner’s technological improvement, with the advanced scanners to facilitate the detection of the aortic arch variants. However, due to the heterogeneity among studies, further research is required.
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Abbreviations
- AA:
-
Aortic arch
- ALSA:
-
Aberrant left subclavian artery
- ARCCA:
-
Aberrant right common carotid artery
- ARSA:
-
Aberrant right subclavian artery
- BCCT:
-
Brachiocephalico-carotid trunk
- BCT:
-
Brachiocephalic trunk
- BiCT:
-
Bicarotid trunk
- CO:
-
Common origin
- CT:
-
Common trunk
- DSA:
-
Digital subtraction angiography
- IMA:
-
Thyroidea ima artery
- LCCA:
-
Left common carotid artery
- LExCA:
-
Left external carotid artery
- LInCA:
-
Left internal carotid artery
- LSA:
-
Left subclavian artery
- LSAA:
-
Left-sided aortic arch
- LVA:
-
Left vertebral artery
- MDCT:
-
Multidetector computed tomography
- MDCTA:
-
Multidetector computed tomographic angiography
- MRA:
-
Magnetic resonance angiography
- RCCA:
-
Right common carotid artery
- RSA:
-
Right subclavian artery
- RVA:
-
Right vertebral artery
- VST:
-
Vertebro-subclavian trunk
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CT: literature search, manuscript writing, quality assessment, and statistical meta-analysis; NL: literature search, data extraction and language editing of the manuscript; MP: literature search, manuscript planning, data collection and extraction and manuscript editing; FD: manuscript editing and supervision; IA: performance of schematic drawings; PA: manuscript editing and KN: proposal of the classification pattern, manuscript editing and supervision.
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Tsiouris, C., Lazaridis, N., Piagkou, M. et al. The left-sided aortic arch variants: prevalence meta-analysis of imaging studies. Surg Radiol Anat 44, 673–688 (2022). https://doi.org/10.1007/s00276-022-02945-4
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DOI: https://doi.org/10.1007/s00276-022-02945-4