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Updated: Mar 22, 2026

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
Left atrial thrombi and spontaneous echo contrast in patients with atrial fibrillation : Systematic analysis of
A G Bejinariu1, D U Härtel2, J Brockmeier2
1Clinic for Cardiology, Angiology and Intensive Care, Klinikum Lippe Detmold, Röntgenstr. 18, 32756, Detmold, Germany. alexandru.bejinariu@klinikum-lippe.de.
Insights
Echocardiographic and epidemiologic factors, not biomarkers, predict left atrial thrombi and spontaneous echo contrast in atrial fibrillation patients. This finding can guide therapeutic strategies for high-risk individuals.
Area of Science:
- Cardiology
- Medical Diagnostics
Background:
- Atrial fibrillation (AF) significantly increases the risk of thromboembolic events.
- Left atrial appendage thrombi and spontaneous echo contrast (SEC) in AF patients correlate with embolic risk.
Purpose of the Study:
- To identify predictors of left atrial thrombi and SEC intensity in patients with atrial fibrillation.
- To evaluate the role of laboratory biomarkers, echocardiographic, and epidemiologic parameters in predicting these outcomes.
Main Methods:
- A study involving 372 patients with atrial fibrillation undergoing electrical cardioversion.
- Assessment of CHA2DS2-VASc and HAS-BLED scores, D-dimer, B-type natriuretic peptide, left atrial volume, and ejection fraction.
- Transesophageal echocardiography-guided strategy was employed.
Main Results:
- Left ventricular ejection fraction and CHA2DS2-VASc score independently predicted left atrial thrombi and SEC intensity.
- Left atrial volume predicted SEC intensity but not thrombi.
- Biomarkers (D-dimer, B-type natriuretic peptide) did not show predictive power for thrombi or SEC.
Conclusions:
- Echocardiographic parameters (ejection fraction, left atrial volume) and epidemiologic scores (CHA2DS2-VASc) are key predictors of left atrial thrombi and SEC.
- Studied laboratory biomarkers lack predictive value in this context.
- Clinical data and transthoracic echocardiography can inform therapeutic strategy adjustments in high-risk AF patients.
Background:
Atrial fibrillation is associated with a high risk for thromboembolic events. Thrombi in the left atrial appendage and spontaneous echo contrast (SEC) correlate positively with this embolic risk. We studied the laboratory, echocardiographic, and epidemiologic parameters that could predict left atrial thrombi and the intensity of the SEC.
Patients And Methods:
Between September 2013 and June 2015 we included 372 patients with atrial fibrillation before planned electrical cardioversion (transesophageal-guided strategy) in this study. After assessing the risk of stroke and bleeding (CHA2DS2-VASc and HAS-BLED scores), we measured the concentration of the D-dimer and B-type natriuretic peptide at the time of the transesophageal echocardiography as well as the left atrial volume and the ejection fraction during transthoracic echocardiography.
Results:
The ejection fraction and the CHA2DS2-VASc score were identified as independent predictors of both left atrial thrombi and SEC, whereas the left atrial volume could only predict the intensity of SEC. In contrast to the results of other studies, the biomarkers in this study failed to predict the outcome.
Conclusion:
Only the echocardiographic and epidemiologic parameters were predictors of left atrial thrombi and SEC intensity, while the studied biomarkers had no predictive power. Using clinical data and transthoracic echocardiography, we can change the therapeutic strategy in high-risk patients.
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