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Titolo:
Filament instability and rotational tissue anisotropy: A numerical study using detailed cardiac models
Autore:
Rappel, WJ;
Indirizzi:
Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 t Phys, La Jolla, CA 92093 USA
Titolo Testata:
CHAOS
fascicolo: 1, volume: 11, anno: 2001,
pagine: 71 - 80
SICI:
1054-1500(200103)11:1<71:FIARTA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPIRAL BREAKUP; VENTRICULAR-TACHYCARDIA; FIBER-ROTATION; IONIC MODEL; FIBRILLATION; TURBULENCE; EXCITATION; MYOCARDIUM; MECHANISMS; DYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Rappel, WJ Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 Jolla, CA 92093 USA
Citazione:
W.J. Rappel, "Filament instability and rotational tissue anisotropy: A numerical study using detailed cardiac models", CHAOS, 11(1), 2001, pp. 71-80

Abstract

The role of cardiac tissue anisotropy in the breakup of vortex filaments is studied using two detailed cardiac models. In the Beeler-Reuter model, modified to produce stable spiral waves in two dimensions, we find that anisotropy can destabilize a vortex filament in a parallelepipedal slab of tissue. The mechanisms of the instability are similar to the ones reported in previous work on a simplified cardiac model by Fenton and Karma [Chaos 8, 20 (1998)]. In the Luo-Rudy model, also modified to produce stable spiral waves in two dimensions, we find that anisotropy does not destabilize filaments. A possible explanation for this model-dependent behavior based on spiral tip trajectories is offered. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 16:36:54