Title :
The relationship between propagation “vorticity” and the repolarization field during atrial activation
Author :
Kay, M.W. ; Bayly, P.V. ; Schuessle, R.B.
Author_Institution :
Dept. of Biomed. Eng., Washington Univ., St. Louis, MO, USA
Abstract :
The objective of this study was to determine, quantitatively, if local changes in wavefront propagation direction (PD) during atrial activation are higher at locations of high gradient of repolarization time (RT). Curl of PD was used to measure these local changes. Results from experiments and simulations were analyzed. Curl of PD was significantly higher at areas of high RT and RT gradient during simulations but significance was not detected in experiments
Keywords :
bioelectric potentials; biological tissues; physiological models; vectors; 2D domain; FitzHugh-Nagumo; action potential; atrial activation; cardiac tissue; high curl; high gradient of repolarization time; local wavefront propagation direction changes; propagation vorticity; repolarization field; spiral waves; Analytical models; Atrial fibrillation; Biomedical engineering; Biomedical measurements; Cardiology; Mechanical engineering; Polynomials; Spirals; Surgery; Testing;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802207
