Reconstruction of Instantaneous Phase of Unipolar Atrial Contact Electrogram Using a Concept of Sinusoidal Recomposition and Hilbert Transform

The Hilbert transform has been used to characterize wave propagation and detect phase singularities during cardiac fibrillation. Two mapping modalities have been used: optical mapping (used to map atria and ventricles) and contact electrode mapping (used only to map ventricles). Due to specific morp...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:IEEE transactions on biomedical engineering Ročník 62; číslo 1; s. 296 - 302
Hlavní autori: Kuklik, Pawel, Zeemering, Stef, Maesen, Bart, Maessen, Jos, Crijns, Harry J., Verheule, Sander, Ganesan, Anand N., Schotten, Ulrich
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States IEEE 01.01.2015
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Algorithms
Atria
Atrial Fibrillation - diagnosis
Atrial Fibrillation - physiopathology
Cardiac arrhythmia
Contact
Deflection
Diagnosis, Computer-Assisted - methods
Educational institutions
Electronic mail
Electrophysiologic Techniques, Cardiac - methods
Humans
Mapping
Materials
Morphology
Noise
Numerical Analysis, Computer-Assisted
Phase transformations
Reconstruction
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted
Timing
Transforms
Wave propagation
phase estimation
cardiology
Biomedical signal processing
fibrillation
ISSN:0018-9294, 1558-2531, 1558-2531
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:The Hilbert transform has been used to characterize wave propagation and detect phase singularities during cardiac fibrillation. Two mapping modalities have been used: optical mapping (used to map atria and ventricles) and contact electrode mapping (used only to map ventricles). Due to specific morphology of atrial electrograms, phase reconstruction of contact electrograms in the atria is challenging and has not been investigated in detail. Here, we explore the properties of Hilbert transform applied to unipolar epicardial electrograms and devise a method for robust phase reconstruction using the Hilbert transform. We applied the Hilbert transform to idealized unipolar signals obtained from analytical approach and to electrograms recorded in humans. We investigated effects of deflection morphology on instantaneous phase. Application of the Hilbert transform to unipolar electrograms demonstrated sensitivity of reconstructed phase to the type of deflection morphology (uni- or biphasic), the ratio of R and S waves and presence of the noise. In order to perform a robust phase reconstruction, we propose a signal transformation based on the recomposition of the electrogram from sinusoidal wavelets with amplitudes proportional to the negative slope of the electrogram. Application of the sinusoidal recomposition transformation prior to application of the Hilbert transform alleviates the effect of confounding features on reconstructed phase.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:0018-9294
1558-2531
1558-2531
DOI:10.1109/TBME.2014.2350029