| Autor: |
Federica Censi, Giovanni Calcagnini, Michele Triventi, Eugenio Mattei, Pietro Bartolini, Ivan Corazza, Giuseppe Boriani |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Annali dell'Istituto Superiore di Sanità, Vol 45, Iss 4, Pp 427-431 (2009) |
| Druh dokumentu: |
article |
| ISSN: |
0021-2571 |
| DOI: |
10.1590/s0021-25712009000400012 |
| Popis: |
The aim of this study was to assess the effect of filtering techniques on the time-domain analysis of the ECG. Multi-lead ECG recordings obtained from chronic atrial fibrillation (AF) patients after successful external cardioversion have been acquired. Several high-pass filtering techniques and three cut-off frequency values were used: Bessel and Butterworth four-pole and two-pole bidirectional and unidirectional filters, at 0.01, 0.05 and 0.5 Hz low cut-off frequency. As a reference, a beat-by-beat linear piecewise interpolation was used to remove baseline wander, on each P-wave. Results show that ECG filtering affects the estimation of P-wave duration in a manner that depends upon the type of filter used: particularly, the bidirectional filters caused negligible variation of P-wave duration, while unidirectional ones provoked an increase higher than 8%. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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