NDLI: Improving the accuracy of forward computations: Different methods to implement the propagation of the depolarization wave front

Content Provider	IEEE Xplore Digital Library
Author	Gerrits, I.H. van Oosterom, A. Oostendorp, T.F.
Copyright Year	2012
Description	Author affiliation: Radboud University Nijmegen Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, the Netherlands (Gerrits, I.H.; van Oosterom, A.; Oostendorp, T.F.)
Abstract	This study addresses the problem of discontinuities in the body surface potentials (BSPs) introduced by the discrete nature of a cardiac surface source model. These physiologically unrealistic discontinuities result from the switching on of the elementary surface source elements based on the timing of activation assigned to their nodes. Two new methods for avoiding such discontinuities are introduced and their effectiveness is analyzed. In the first method only the contributions of the activated parts of the source elements are evaluated. This results in a more physiologically realistic description of cardiac source activity and is referred to as the gold standard. In addition, a faster, approximate method was developed, in which the contribution of any source element at a particular time is weighted with the activated fraction of its surface. Both methods prevent the discontinuities; the fast method provides a useful approximation and yields a fast implementation as required in interactive forward simulations and is useful in inverse modeling.
Starting Page	309
Ending Page	312
File Size	314527
Page Count	4
File Format	PDF
ISBN	9781467320764
ISSN	2325887X
e-ISBN	9781467320771
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-09
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Creative Commons Attribution License 2.5 (CCAL)
Subject Keyword	Standards Gold Filtering Physiology Electrocardiography Surface waves
Content Type	Text
Resource Type	Article
Subject	Computer Science Cardiology and Cardiovascular Medicine

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