TY - JOUR
T1 - Refraction of scroll-wave filaments at the boundary between two reaction-diffusion media
AU - Zemlin, Christian W.
AU - Varghese, Frency
AU - Wellner, Marcel
AU - Pertsov, Arkady M.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/3/20
Y1 - 2015/3/20
N2 - We explore the shape and the dynamics of scroll-wave filaments in excitable media with an abruptly changing diffusion tensor, important for cardiac applications. We show that, similar to a beam of light, the filament refracts at the boundary separating domains with different diffusion. We derive the laws of filament refraction and test their validity in computational experiments. We discovered that at small angles to the interface, the filament can become unstable and develop oscillations. The nature of the observed instabilities, as well as overall theoretical and experimental significance of the findings, is discussed.
AB - We explore the shape and the dynamics of scroll-wave filaments in excitable media with an abruptly changing diffusion tensor, important for cardiac applications. We show that, similar to a beam of light, the filament refracts at the boundary separating domains with different diffusion. We derive the laws of filament refraction and test their validity in computational experiments. We discovered that at small angles to the interface, the filament can become unstable and develop oscillations. The nature of the observed instabilities, as well as overall theoretical and experimental significance of the findings, is discussed.
UR - http://www.scopus.com/inward/record.url?scp=84925869578&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.114.118303
DO - 10.1103/PhysRevLett.114.118303
M3 - Article
C2 - 25839316
AN - SCOPUS:84925869578
SN - 0031-9007
VL - 114
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
M1 - 118303
ER -