Details

Autor(en) / Beteiligte

• Guo, Jian-ping
• Jia, Xin
• Sai, Zhe
• Ge, Yang-yang
• Wang, Sen
• Guo, Wei

Titel

Thoracic aorta dimension changes during systole and diastole: evaluation with ECG-gated computed tomography

Ist Teil von

• Annals of vascular surgery, 2016-08, Vol.35, p.168-173

Ort / Verlag

Netherlands: Elsevier Inc

Erscheinungsjahr

2016

Quelle

MEDLINE

Beschreibungen/Notizen

• Objective This study was conducted to characterize the differences in the dimensions between systole and diastole in thoracic aorta in Chinese population with ECG-gated multi-detector CTA scans. Methods The CT angiograms of 56 patients (mean age 58.2±17.9ys; 42 males, 14 females) both in systole and diastole were obtained on a 64-slice ECG-gated multi-detector CT scanner. Four anatomic levels of the thoracic aorta were selected for analysis (Level A:1 cm proximal to the innominate artery; Level B:1 cm distal to the left common carotid artery; Level C:1 cm distal to the left subclavian artery; Level D:10 cm distal to the left subclavian artery). On each level, the maximal and the minimal diameters were measured both in systole and diastole. Results The paired sample t test results showed a significant difference between the systolic and diastolic diameters in all individual subjects on every level. The diameter differences range between minus 1.7mm (diastolic dimension is greater than systolic dimension) and 3.6mm (systolic dimension is greater than diastolic dimension). The aortic diameters in diastolic phase are greater than in systolic phase in 18%-22% subjects on different levels. A mean maximum diameter change of 2.68% (range -3.45% to 8.25%), and a mean minimum diameter change of 2.71% (range -5.05% to 8.38%) were found at level A; a maximum diameter change of 2.89% (range -4.5% to 13.3%), and minimum diameter change of 2.37% (range -5.2% to 14.9%) at LevelB;amaximum diameter change of 2.81% (range -6.02% to 10.85%), and minimum diameter change of 2.92% (range -7.14% to 9.62%) at Level C; a maximum diameter change of 3.08% (range -1.76% to 10.36%), and a minimum diameter change of 2.93% (range -2.37% to 11.9%) at Level D. Conclusions Our study verifies that the dimensional differences in thoracic aorta between systolic and diastolic phase are significant. But the pulsatility of thoracic aorta in Chinese population might be different from published literature.