Author/Editor		Hasan, Muhammad A.; Starc, Vito; Porta, Alberto; Abbott, Derek; Baumert, Mathias
Title		Improved ECG pre-processing for beat-to-beat QT interval variability measurement
Type		članek
Source		In: Proceedings of the 35nd Annual international conference of the IEEE EMBS, Osaka, Japan, 3 -7 July, 2013 [New York : IEEE Press
Publication year		2013
Volume		str. 2563-2566
Language		eng
Abstract		The aim of this study was to enhance the ECG pre-processing modalities for beat-to-beat QT interval variability measurement based on template matching. The R-peak detection algorithm has been substituted and an efficient baseline removal algorithm has been implemented in existing computer software. To test performance we used simulated ECG data with fixed QT intervals featuring Gaussian noise, baseline wander and amplitude modulation and two alternative algorithms. We computed the standard deviation of beat-to-beat QT intervals as a marker of QT interval variability (QTV). Significantly a lower beat-to-beat QTV was found in the updated approach compared the original algorithm. In addition, the updated template matching computer software outperformed the previous version in discarding fewer beats. In conclusion, the updated ECG preprocessing algorithm is recommended for more accurate quantification of beat-to-beat QT interval variability.
Keywords		QT interval computer software variability measurement QT interval računalniška programska oprema merjenje variabilnosti