Jian-Ping Guo1, Xin Jia2, Zhe Sai1, Yang-Yang Ge1, Sen Wang1, Wei Guo1. 1. Vascular Surgery Department, Chinese PLA General Hospital, Beijing, China. 2. Vascular Surgery Department, Chinese PLA General Hospital, Beijing, China. Electronic address: dr.jiaxin@hotmail.com.
Abstract
BACKGROUND: This study was conducted to characterize the differences in the dimensions between systole and diastole in thoracic aorta in Chinese population with electrocardiogram (ECG)-gated multidetector computed tomography angiography (CTA) scans. METHODS: The CTAs of 56 patients (mean age 58.2 ± 17.9 years; 42 men, 14 women) both in systole and diastole were obtained on a 64-slice ECG-gated multidetector 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; and 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 -1.7 mm (diastolic dimension is greater than systolic dimension) and 3.6 mm (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 a minimum diameter change of 2.37% (range -5.2% to 14.9%) were found at Level B; a maximum diameter change of 2.81% (range -6.02% to 10.85%) and a minimum diameter change of 2.92% (range -7.14% to 9.62%) were found at Level C; and 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%) were found 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.
BACKGROUND: This study was conducted to characterize the differences in the dimensions between systole and diastole in thoracic aorta in Chinese population with electrocardiogram (ECG)-gated multidetector computed tomography angiography (CTA) scans. METHODS: The CTAs of 56 patients (mean age 58.2 ± 17.9 years; 42 men, 14 women) both in systole and diastole were obtained on a 64-slice ECG-gated multidetector 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; and 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 -1.7 mm (diastolic dimension is greater than systolic dimension) and 3.6 mm (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 a minimum diameter change of 2.37% (range -5.2% to 14.9%) were found at Level B; a maximum diameter change of 2.81% (range -6.02% to 10.85%) and a minimum diameter change of 2.92% (range -7.14% to 9.62%) were found at Level C; and 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%) were found 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.
Authors: Peter Chiu; Hong-Pyo Lee; Alex R Dalal; Tiffany Koyano; Marie Nguyen; Andrew J Connolly; Ovijit Chaudhuri; Michael P Fischbein Journal: JVS Vasc Sci Date: 2021-10-08