Impact of Signal Preprocessing on the Inverse Localization of the Origin of Ventricular Pacing

Date

2018-01-01

Author

Svehlikova, Jana
Zelinka, Jan
Serinağaoğlu Doğrusöz, Yeşim
Good, Wilson
Tysler, Milan
Bear, Laura

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

154
views

0
downloads

The ECG signal measured in clinical or experimental conditions is usually contaminated by noise, which should be eliminated by proper signal processing methods. The selection of the method can be crucial for the results obtained from measured signal. Seven methods of high frequency noise removal and four methods of baseline drift removal were applied on experimental ECG signals measured during 30 s of induced ventricular pacing. Then for all possible combinations of the signal pre-processing methods an averaged signal representing one heart beat was computed. The origin of ventricular activity was assessed by the inverse solution using a single dipole. The impact of preprocessing on the quality of the inverse solution was observed. The localization error between the known position of the stimulating electrode and the computed origin of ventricular activation was more than 5 cm if the baseline of the processed signal did not coincide with the zero line. However, if the processed signal started from the zero value, an acceptable localization error from 0.7 to 1.3 cm was obtained. The inverse assessment of the origin of ventricular tachycardia using a single dipole is very sensitive to proper baseline drift removal. Because the inverse solution was computed for averaged signal, various methods of high frequency noise removal did not affect the results.

URI

https://hdl.handle.net/11511/44646

DOI

https://doi.org/10.22489/cinc.2018.315

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Effect of surface roughness on ultrasonic testing İşleyici, Umut; Doyum, Bülent; Department of Mechanical Engineering (2005) This study investigates the effect of front surface roughness on ultrasonic echo amplitude. Experiments were carried out on specimens whose front surfaces are machined by milling machine. Machining parameters were changed in milling process in order to obtain desired roughness values and milling head was tilted to a very small angle to obtain periodic rough surfaces. Experiments were performed with these specimens having roughness value of 0.5, 4.5, 11, 26.5 æm. Ra. The back surface roughness of all specime...
Effects of experimental parameters in monitoring the hydration of cement mortars by ultrasonic testing Keskin, Ö. Kasap; Yaman, İsmail Özgür; Tokyay, Mustafa (2012-12-01) In ultrasonic pulse velocity testing, frequency and the travel path length are important parameters that determine the attenuation rate and the influence of near-field effect. Higher frequencies and longer distances result in higher attenuation. On the other hand, smaller path lengths are not desirable due to near-field effect. This study investigated the effect of transducer frequency and the length of path used to determine ultrasonic wave velocity in monitoring the hydration process of fresh cement morta...
Effects of Substrate Parameters on the Resonance Frequency of Double-sided SRR Structures under Two Different Excitations Ekmekci, E.; Averitt, R. D.; Sayan, Gönül (2010-07-08) In this study, we numerically investigate the effects of substrate parameters (i.e., the thickness and the permittivity) on the resonance frequency of the double-sided SRR (DSRR) structure under two different excitation conditions. This includes either electric or magnetic excitations which are two common techniques to obtain a resonant effective permittivity or permeability, respectively. The numerical calculations are performed using CST Microwave Studio. The numerical results reveal a similar trend in th...
Effect of soil bridge interaction on the distribution of live load effects among integral bridge components Erhan, S.; Dicleli, Murat (2010-07-15) In this study, the effect of soil-bridge interaction on the magnitude of the internal forces in integral bridge (IB) components due to live load effects is studied. For this purpose, structural models of typical IBs are built by including and excluding the effect of backfill and foundation soil. The analyses of the models are then conducted under AASHTO live load. In the analyses, the effects of the backfill and foundation soil on the magnitude of the internal forces in IB components are studied for various...
Effect of parallel and antiparallel configuration on magnetic damping in Co/Ag/Co/Gd Demirtas, S.; Salamon, M. B.; Koymen, A. R. (AIP Publishing, 2011-06-01) When two ferromagnetic layers have a common resonance frequency, the usual spin-pumping broadening may be reduced by dynamic exchange coupling. Utilizing the antiferromagnetic coupling between Co and Gd, we explore the change in ferromagnetic resonance accompanying a spontaneous transition from parallel to antiparallel magnetic alignment of two Co films below the compensation temperature T-comp. Above T-comp, the data are consistent with conventional models. However, a rapid doubling of magnetic damping acc...

Citation Formats

J. Svehlikova, J. Zelinka, Y. Serinağaoğlu Doğrusöz, W. Good, M. Tysler, and L. Bear, “Impact of Signal Preprocessing on the Inverse Localization of the Origin of Ventricular Pacing,” 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44646.