Dynamic Changes in the Aorta During the Cardiac Cycle Analyzed by ECG-Gated Computed Tomography

Frontiers in Cardiovascular Medicine

article

Wenying Zhu¹  Yingliang Wang¹  Yang Chen¹  Jiacheng Liu¹  Chen Zhou¹  Qin Shi¹  Songjiang Huang¹  Chongtu Yang¹  Tongqiang Li¹  Bin Xiong¹ 

[1] Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology;Hubei Key Laboratory of Molecular Imaging

关键词: aorta;    diameter;    dynamic changes;    cardiac cycle;    oversizing;   

DOI  :  10.3389/fcvm.2022.793722

学科分类：地球科学(综合)

来源: Frontiers

【 摘 要 】

Background To characterize the difference in aortic dimensions during the cardiac cycle with electrocardiogram (ECG)-gated computed tomography angiography (CTA) and to determine whether other parameters in comparison to diameter could potentially provide a more accurate size reference for stent selection at the aortic arch and the proximal thoracic descending aorta. Methods The CTA imaging of 90 patients during the cardiac cycle was reviewed. Three anatomic locations were selected for analysis (level A: 1 cm proximal to the innominate artery; level B: 1 cm distal to the left common carotid artery; and level C: 1 cm distal to the left subclavian artery). We measured the maximum diameter, the minimum diameter, the lumen area, the lumen perimeter, and the diameter derived from the lumen area, and the changes of each parameter at each level during the cardiac cycle were compared. Results The mean age was 60.9 ± 12.4 years (range, 16–78 years). There was a significant difference in the aortic dimensions during the cardiac cycle ( p < 0.001). The diameter derived from the lumen area at all three levels was changed least over time when compared to the area, perimeter, and the maximum aortic diameter (all p < 0.01). Conclusion The aortic dimensional differences during the cardiac cycle are significant. The aortic diameter derived from the lumen area over other parameters may provide a better evaluation for selecting the size of the stent at the aortic arch and the proximal thoracic descending aorta. A prospective study comparing these different measurement parameters regarding the outcomes is still needed to evaluate the clinical implications.

【 授权许可】

CC BY