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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

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Estimating left atrial enlargement parameters from the electrocardiogram using wavelets.

David Duanne Rowlands¹, Adrian Diery, Anthony Forshaw

¹Centre for Wireless Monitoring and Applications, Griffith University, Brisbane, Queensland, Australia. d.rowlands@griffith.edu.au

Journal of Electrocardiology

|October 25, 2011

Summary

Electrocardiogram P waves can estimate left atrial enlargement using wavelet analysis. This non-invasive method shows good correlation with echocardiogram and cardiac magnetic resonance measurements.

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Area of Science:

Cardiology
Biomedical Engineering
Signal Processing

Background:

Left atrial enlargement is a significant indicator of cardiovascular disease.
Current methods for assessing left atrial size include echocardiogram and cardiac magnetic resonance imaging.
Non-invasive methods to assess left atrial size are highly desirable.

Purpose of the Study:

To investigate the utility of the electrocardiogram (ECG) P wave in assessing left atrial enlargement.
To correlate P wave features with established measures of left atrial size from echocardiography and cardiac magnetic resonance imaging (CMR).

Main Methods:

Wavelet-based features were extracted from the P wave of the ECG.
These features were correlated with left atrial diameter, area, and volume index obtained from echocardiogram and CMR.
Statistical analysis was performed to determine the strength of correlations.

Main Results:

Significant correlations (r > 0.5, P < .01) were observed between several wavelet features and left atrial enlargement measures.
Left atrial diameter and area showed the strongest correlation with the derived Z lead.
Left atrial volume index correlated best with the derived X lead.

Conclusions:

Wavelet analysis of the ECG P wave provides a feasible method for estimating left atrial size.
This approach offers a potential non-invasive tool for assessing left atrial enlargement.
Further research may validate P wave analysis as a complementary diagnostic method.