A method for quantifying atrial fibrillation organization based on wave-morphology similarity

A new method for quantifying the organization of single bipolar electrograms recorded in the human atria during atrial fibrillation (AF) is presented. The algorithm relies on the comparison between pairs of local activation waves (LAWs) to estimate their morphological similarity, and returns a regul...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 2002-12, Vol.49 (12), p.1504-1513
Main Authors: Faes, L., Nollo, G., Antolini, R., Gaita, F., Ravelli, F.
Format: Article
Language:English
Subjects:
Activation
Algorithms
Atrial fibrillation
Atrial Fibrillation - classification
Atrial Fibrillation - physiopathology
Biological and medical sciences
Bundle of His - physiopathology
Catheters
Electrocardiography - classification
Electrocardiography - methods
Fibrillation
Heart Rate
Humans
Laws
Medical sciences
Models, Cardiovascular
Organizations
Pattern Recognition, Automated
Regularity
Reproducibility of Results
Rhythm
Sensitivity and Specificity
Signal processing
Signal processing algorithms
Signal Processing, Computer-Assisted
Similarity
Surface morphology
Surface treatment
Time measurement
Vibration
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Summary:A new method for quantifying the organization of single bipolar electrograms recorded in the human atria during atrial fibrillation (AF) is presented. The algorithm relies on the comparison between pairs of local activation waves (LAWs) to estimate their morphological similarity, and returns a regularity index (/spl rho/) which measures the extent of repetitiveness over time of the detected activations. The database consisted of endocardial data from a multipolar basket catheter during AF and intraatrial recordings during atrial flutter. The index showed maximum regularity (/spl rho/=1) for all atrial flutter episodes and decreased significantly when increasing AF complexity as defined by Wells (type I: /spl rho/=0.75/spl plusmn/0.23; type II: /spl rho/=0.35/spl plusmn/0.11; type III: /spl rho/=0.15/spl plusmn/0.08; P
ISSN:0018-9294
1558-2531
DOI:10.1109/TBME.2002.805472