Assessing the effect of uncertainty in intracavitary electrode position on endocardial potential estimates

The aim of the simulation study is to determine the effect of uncertainty in intracavitary probe electrode position on the accuracy of estimated endocardial potentials. Intracavitary probe position uncertainty is simulated by randomly moving an idealized probe surface about the center of an idealize...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 1992-07, Vol.39 (7), p.676-681
Main Authors: Derfus, D.L., Pilkington, T.C.
Format: Article
Language:English
Subjects:
Action Potentials
Bias
Bioelectric phenomena
Biological and medical sciences
Biomedical engineering
Biomedical measurements
Computer Simulation
Conductors
Electric potential
Electrocardiography - methods
Electrocardiography - standards
Electrocardiography. Vectocardiography
Electrodes
Electrodes, Implanted - standards
Electrodiagnosis. Electric activity recording
Endocardium
Evaluation Studies as Topic
Heart
Humans
Inverse problems
Investigative techniques, diagnostic techniques (general aspects)
Medical sciences
Probes
Tachycardia - diagnosis
Uncertainty
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Summary:The aim of the simulation study is to determine the effect of uncertainty in intracavitary probe electrode position on the accuracy of estimated endocardial potentials. Intracavitary probe position uncertainty is simulated by randomly moving an idealized probe surface about the center of an idealized left ventricular endocardial surface. These random deviations represent possible probe locations that are incorporated as correlated noise. An optimum inverse transfer coefficient matrix, relating intracavitary potentials to endocardial potentials, is computed and subsequently used to calculate the best linear estimate of the true endocardial potentials. These simulation results imply that position uncertainty of a multielectrode, intracavitary probe can be a major source of error in estimating endocardial potentials from intracavitary potentials.< >
ISSN:0018-9294
1558-2531
DOI:10.1109/10.142642