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Published on: July 19, 2016
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Analysis of Systolic Backflow and Secondary Helical Blood Flow in the Ascending Aorta Using Vector Flow Imaging
Kristoffer Lindskov Hansen1, Hasse Møller-Sørensen2, Jesper Kjaergaard3
1Radiology Department, Rigshospitalet, Blegdamsvej, Copenhagen, Denmark.
Ultrasound in Medicine & Biology
|January 18, 2016
Summary
Secondary rotational flow is a normal phenomenon in the ascending aorta, while systolic backflow, present in 40% of patients, is associated with injury and atherosclerosis. Transverse oscillation imaging reveals these blood flow patterns.
Area of Science:
- Cardiovascular Physiology
- Medical Imaging
- Hemodynamics
Background:
- Secondary rotational flow and systolic backflow are observed in the ascending aorta.
- Understanding these flow patterns is crucial for assessing aortic health.
Purpose of the Study:
- To analyze secondary rotational flow and systolic backflow in the ascending aorta using the vector velocity method with transverse oscillation.
- To correlate these flow patterns with patient demographics, cardiovascular parameters, and aortic conditions.
Main Methods:
- Intra-operative vector velocity imaging via transverse oscillation in 25 patients.
- Comparison with transesophageal echocardiography and pulmonary artery catheter thermodilution.
- Correlation analysis with age, gender, aortic diameter, atherosclerotic plaques, ejection fraction, and myocardial infarction history.
Main Results:
- Secondary flow was universally present, with significant associations between its duration, rotational frequency, and flow direction.
- Systolic backflow occurred in 40% of patients, linked to systolic velocities and atherosclerotic plaques.
- No other significant correlations were found.
Conclusions:
- Secondary flow is a normal physiological finding in the ascending aorta.
- Systolic backflow may indicate injury and is associated with atherosclerosis.
- Transverse oscillation is a valuable technique for detailed assessment of ascending aorta blood flow.
Keywords:
Ascending aortaAtherosclerotic plaqueSecondary rotational flowSystolic backflowTransverse oscillationUltrasoundVector flow ImagingMore Related Videos
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