Ventricular artifacts cancellation from atrial epicardial recordings in atrial tachyarrhythmias.
Atrial tachyarrhythmias are a very common cardiovascular disease in clinical practice with an incidence that doubles with each advancing decade. A key issue to understand their pathophysiological mechanisms is the analysis and interpretation of atrial electrograms (AEG). To properly study these signals, ventricular artifacts have to be removed from the AEG. In this work, a new application of independent component analysis (ICA) to the AEG is presented where ventricular artifacts are removed from atrial recordings making use of only one reference lead. Therefore the technique is suitable when multi-lead recordings are unavailable as in atrial implantable cardioverter-defibrilators. The methodology has been compared with traditional techniques on a database of 20 patients. Performance was evaluated through atrial waveform similarity (S) and ventricular activity reduction (V D R) as a function of atrial rhythm regularity on a beat-by-beat basis. When the atrial tachyarrhythmia is quite regular, results show that ICA preserves the atrial waveform better than the other methods (median S = 99:64%) whereas maintaining ventricular reduction (median VDR = 6:32dB).
Rieta
Jose J
JJ
Biomedical Synergy, Valencia University of Technology, Campus de Gandia, 46730, Gandia, Spain. jjrieta@ieee.org
Hornero
Fernando
F
Alcaraz
Raul
R
Moratal
David
D
D016477:Artifacts; D001281:Atrial Fibrillation / Q000503:physiopathology*; D004562:Electrocardiography; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans