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Updated: Feb 19, 2026
08:10
Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
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Atrial fibrillation does not affect ankle-brachial index measured using the Doppler method
Michał Dąbrowski1, Jacek Lewandowski1, Piotr Abramczyk1
1Department of Internal Medicine, Hypertension and Vascular Diseases, Medical University of Warsaw, Warsaw, Poland.
Summary
Atrial fibrillation (AF) may impact blood pressure readings. This study found that AF did not significantly affect ankle-brachial index (ABI) measurements, suggesting reliable ABI assessment is possible even with arrhythmia.
Area of Science:
- Cardiology
- Vascular Medicine
- Diagnostic Tools
Background:
- Atrial fibrillation (AF) is a common arrhythmia that can influence physiological measurements.
- The ankle-brachial index (ABI) assesses peripheral artery disease but may be affected by arrhythmias like AF.
Purpose of the Study:
- To determine if atrial fibrillation (AF) influences ankle-brachial index (ABI) measurements.
- To evaluate the clinical significance of ABI variations in patients with AF.
Main Methods:
- Ninety-nine patients undergoing electrical cardioversion for AF were studied.
- Ankle-brachial index (ABI) was measured using Doppler on both lower extremities before and after cardioversion.
- Measurements were repeated thrice and averaged; Bland-Altman analysis was used.
Main Results:
- ABI values were statistically lower during AF compared to sinus rhythm (P=0.019 for right, P=0.011 for left).
- However, the differences were clinically insignificant, with upper 95% CI margins of 0.045 and 0.040.
- Strong correlations (r=0.61, P<0.001 and r=0.67, P<0.001) and good agreement were observed between measurements.
Conclusions:
- Atrial fibrillation (AF) does not exert a clinically significant effect on ankle-brachial index (ABI) measurements.
- ABI can be reliably assessed in patients with AF, even during the arrhythmia.
- Restoration of sinus rhythm does not lead to clinically meaningful changes in ABI.
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