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Differences in aortic vortex flow pattern between normal and patients with stroke: qualitative and quantitative assessment using transesophageal contrast echocardiography
- Source :
- The International Journal of Cardiovascular Imaging. 32:45-52
- Publication Year :
- 2015
- Publisher :
- Springer Science and Business Media LLC, 2015.
-
Abstract
- The flow in the aorta forms a vortex, which is a critical determinant of the flow dynamics in the aorta. Arteriosclerosis can alter the blood flow pattern of the aorta and cause characteristic alterations of the vortex. However, this change in aortic vortex has not yet been studied. This study aimed to characterize aortic vortex flow pattern using transesophageal contrast echocardiography in normal and stroke patients. A total of 85 patients who diagnosed with ischemic stroke and 16 normal controls were recruited for this study. The 16 normal control subjects were designated as the control group, and the 85 ischemic stroke patients were designated as the stroke group. All subjects underwent contrast transesophageal echocardiography (TEE), and particle image velocimetry was used to assess aortic vortex flow. Qualitative and quantitative analyses of vortex flow morphology, location, phasic variation, and pulsatility were undertaken and compared between the groups. In the control group, multiple irregularly-shaped vortices were observed in a peripheral location in the descending thoracic aorta. In contrast, the stroke group had a single, round, merged, and more centrally located aortic vortex flow. In the quantitative analysis of vortex, vortex depth, which represents the location of the major vortex in the aorta, was significantly higher in the control group than in the stroke group (0.599 ± 0.159 vs. 0.522 ± 0.101, respectively, P = 0.013). Vortex relative strength, which is the pulsatility parameter of the vortex itself, was significantly higher in the stroke group than in the control group (0.367 ± 0.148 vs. 0.304 ± 0.087, respectively, P = 0.025). It was feasible to visualize and quantify the characteristic morphology and pulsatility of the aortic vortex flow using contrast TEE, and aortic vortex pattern significantly differed between normal and stroke patients.
- Subjects :
- Adult
Male
medicine.medical_specialty
Pulsatile flow
Contrast Media
Hemodynamics
Aorta, Thoracic
030204 cardiovascular system & hematology
Ventricular Function, Left
Brain Ischemia
030218 nuclear medicine & medical imaging
Aorta
Stroke
Vortex
03 medical and health sciences
0302 clinical medicine
Predictive Value of Tests
Internal medicine
medicine.artery
Humans
Medicine
Thoracic aorta
Radiology, Nuclear Medicine and imaging
Prospective Studies
Aged
Observer Variation
Fluorocarbons
business.industry
Reproducibility of Results
Blood flow
Arteriosclerosis
Middle Aged
medicine.disease
Regional Blood Flow
Case-Control Studies
Pulsatile Flow
Cardiology
Feasibility Studies
Female
Radiology
Cardiology and Cardiovascular Medicine
business
Echocardiography, Transesophageal
Subjects
Details
- ISSN :
- 15730743 and 15695794
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- The International Journal of Cardiovascular Imaging
- Accession number :
- edsair.doi.dedup.....5d7f8ea6d0c1b44d92d3eb41eb59d9ac