Estimation of Cardiac Fibre Direction Based on Activation Maps

This collection of MATLAB code relates to work by De Vries et al. [1]. In this paper, a novel estimator for the global fibre direction (fibdirVries.m) is proposed, using local activation times. The method is based on fitting reciprocal conduction velocities, here called conduction slowness, to an ellipse. Its performance is evaluated and compared to a pre-existing method based on ordinary conduction velocity [2].

A demo script is included as an example demonstration of how the included functions can be used. This demo script also generates the MATLAB figures that appear in the paper. Brief function descriptions are provided for all functions, which can also be called up through the help command.

[1] J. W. de Vries, M. Sun, N. M. S. de Groot, and R. C. Hendriks, “Estimation of cardiac fibre direction based on activation maps,” in 2023 IEEE Int. Conf. Acoust. Speech Signal Process. Proc., Rhodes, Greece, Jun. 2023.
[2] R. P. M. Houben, N. M. S. de Groot, J. L. R. M. Smeets, A. E. Becker, F. W. Lindemans, and M. A. Allessie, “S-wave predominance of epicardial electrograms during atrial fibrillation in humans: Indirect evidence for a role of the thin subepicardial layer,” Heart Rhythm, vol. 1, no. 6, pp. 639–647, Dec. 2004.

Related publications

1. Estimation of Cardiac Fibre Direction Based on Activation Maps
   J. W. de Vries; M. Sun; N. M. S. de Groot; R. C. Hendriks;
   In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP),
   2023.