Three-dimensional organization of electrical turbulence that is induced via
the phenomenon of spiral breakup is studied in a computer model of the hea
rt, which includes realistic ventricular geometries and cardiac anisotropy.
We find filaments of rotors during the turbulence and study their number a
nd length as a function of the heart size. We perform a dimensional analysi
s of turbulence. [S1063-651X(99)50606-5].