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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
Background:
The aim of this article was to examine the utility of using the P wave of the electrocardiogram to indicate left atrial enlargement measures determined from the echocardiogram and cardiac magnetic resonance.
Method:
Wavelet-based features extracted from the beat-averaged P wave were correlated to the left atrial diameter, left atrial area, and left atrial volume index measures from echocardiogram and cardiac magnetic resonance.
Results:
Significant correlations were found between several of the wavelet features and the left atrial enlargement size measures (r > 0.5, P < .01). Left atrial diameter and left atrial area correlated best to the derived Z lead, and left atrial volume index correlated best to the derived X lead.
Conclusions:
The good correlations illustrate that it is feasible to estimate the size of the left atrium from the P wave using wavelet techniques.
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