Title :
Accurate localization of phase singularities during reentry
Author :
Iyer, Anand N. ; Ideker, Raymond E. ; Gray, Richard A.
Author_Institution :
Dept. of Biomed. Eng., Alabama Univ., Birmingham, AL, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Computer simulations using a two state variable model scaled appropriately for cardiac tissue were used to study the accuracy with which phase singularities could be localized. The accuracy of localizing a phase singularity is dependent on the choice of a center point in state space used to calculate phase maps. In order to treat simulation data as experimental data, only one variable was used and different levels of noise were added for the analyses. For signal to noise ratios of 5 and above, precise determination of the center point was not necessary to identify the singularity with 1 mm accuracy
Keywords :
bioelectric phenomena; cardiology; digital simulation; physiological models; accurate localization; cardiac reentry; center point; phase maps; phase singularities; signal to noise ratios; state space; two state variable model; Analytical models; Biomedical engineering; Cardiac tissue; Computer simulation; Delay effects; Electronic mail; Noise level; Signal to noise ratio; Spirals; State-space methods;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802205
