Abstract
The main objective of this article is to implement and compare QRS subtraction techniques for intra-cardiac atrial electrograms based on using the surface ECG as a reference. A band-pass filter between 8 and 20 Hz followed by rectification, and then a low-pass filter at 6 Hz are used for QRS detection. QRS subtraction was performed using three different approaches: flat, linear and spline interpolations. QRS subtraction affects the power of the signals but it normally does not affect the dominant frequency. The average power of the atrial electrograms after QRS subtraction is significantly reduced for frequencies above 10 Hz.
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Acknowledgements
The study described in this article is part of the research portfolio supported by the Leicester NIHR Biomedical Research Unit in Cardiovascular Disease. This research is also funded by the Ministry of Higher Education of Malaysia and Universiti Teknologi Malaysia. In addition, João Loures is supported by The National Council for Scientific and Technological Development (CNPq) of Brazil, process no. 200598/2009-0.
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Ahmad, A., Salinet, J.L., Brown, P. et al. QRS subtraction for atrial electrograms: flat, linear and spline interpolations. Med Biol Eng Comput 49, 1321–1328 (2011). https://doi.org/10.1007/s11517-011-0829-9
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DOI: https://doi.org/10.1007/s11517-011-0829-9