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Techniques for automated local activation time annotation and conduction velocity estimation in cardiac mapping.

Cantwell CD, Roney CH, Ng FS, Siggers JH, Sherwin SJ, Peters NS - Comput. Biol. Med. (2015)

Bottom Line: Many of these algorithms require identification of activation times from electrogram recordings which themselves may have complex morphology or low signal-to-noise ratio.This paper surveys algorithms designed for identifying local activation times and computing conduction direction and speed.Their suitability for use in different recording contexts and applications is assessed.

View Article: PubMed Central - PubMed

Affiliation: Department of Aeronautics, Imperial College London, South Kensington Campus, London, UK; National Heart and Lung Institute, Imperial College London, South Kensington Campus, London, UK. Electronic address: c.cantwell@imperial.ac.uk.

No MeSH data available.


Related in: MedlinePlus

Estimation of planar wavefront velocity from differences in location and activation time. Expressions relating inter-electrode distances normal to the wavefront, , and their corresponding time delay can be used to estimate d, and subsequently compute the wavefront speed, v.
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f0045: Estimation of planar wavefront velocity from differences in location and activation time. Expressions relating inter-electrode distances normal to the wavefront, , and their corresponding time delay can be used to estimate d, and subsequently compute the wavefront speed, v.

Mentions: Defining , a system of equations, (xj−xi)·d=τij,can be derived which relate inter-electrode distances in the direction of the wavefront with corresponding time delays, as shown in Fig. 9. This can be written in matrix form as A⊤d=t,and solved in a least-squares sense, due to measurement error and the premise that the activation wavefront is not truly planar.


Techniques for automated local activation time annotation and conduction velocity estimation in cardiac mapping.

Cantwell CD, Roney CH, Ng FS, Siggers JH, Sherwin SJ, Peters NS - Comput. Biol. Med. (2015)

Estimation of planar wavefront velocity from differences in location and activation time. Expressions relating inter-electrode distances normal to the wavefront, , and their corresponding time delay can be used to estimate d, and subsequently compute the wavefront speed, v.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4593301&req=5

f0045: Estimation of planar wavefront velocity from differences in location and activation time. Expressions relating inter-electrode distances normal to the wavefront, , and their corresponding time delay can be used to estimate d, and subsequently compute the wavefront speed, v.
Mentions: Defining , a system of equations, (xj−xi)·d=τij,can be derived which relate inter-electrode distances in the direction of the wavefront with corresponding time delays, as shown in Fig. 9. This can be written in matrix form as A⊤d=t,and solved in a least-squares sense, due to measurement error and the premise that the activation wavefront is not truly planar.

Bottom Line: Many of these algorithms require identification of activation times from electrogram recordings which themselves may have complex morphology or low signal-to-noise ratio.This paper surveys algorithms designed for identifying local activation times and computing conduction direction and speed.Their suitability for use in different recording contexts and applications is assessed.

View Article: PubMed Central - PubMed

Affiliation: Department of Aeronautics, Imperial College London, South Kensington Campus, London, UK; National Heart and Lung Institute, Imperial College London, South Kensington Campus, London, UK. Electronic address: c.cantwell@imperial.ac.uk.

No MeSH data available.


Related in: MedlinePlus