How to measure propagation velocity in cardiac tissue: a simulation study.
Front Physiol
; 5: 267, 2014.
Article
em En
| MEDLINE
| ID: mdl-25101004
ABSTRACT
To estimate conduction velocities from activation times in myocardial tissue, the "average vector" method computes all the local activation directions and velocities from local activation times and estimates the fastest and slowest propagation speed from these local values. The "single vector" method uses areas of apparent uniform elliptical spread of activation and chooses a single vector for the estimated longitudinal velocity and one for the transversal. A simulation study was performed to estimate the influence of grid size, anisotropy, and vector angle bin size. The results indicate that the "average vector" method can best be used if the grid- or bin-size is large, although systematic errors occur. The "single vector" method performs better, but requires human intervention for the definition of fiber direction. The average vector method can be automated.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Front Physiol
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Holanda