  Some mechanisms of cardiac arrhythmias can be presented as a composition of
elementary acts of block and reflection on the contacts of homogeneous areas of
the conducting tissue. For study this phenomena we use an axiomatic
one-dimensional model of interaction of cells of excitable tissue. The model
has four functional parameters that determine the functional states durations
of the cell. We show that the cells of a homogeneous excitable tissue,
depending on the ratio of the durations of the functional intervals, can
operate in the mode of solitary waves conduction or in one of three modes of
selfgeneration. It is proved that the propagation of a solitary wave through
the boundary of homogeneous conducting tissues can be accompanied by a block or
multiplex reflection. Block and reflection are unidirectional phenomena, and
there are not compatible on the same boundary. Systematized rules of
transmitting, block and reflection waves at the boundary of homogeneous
conducting tissues open up new possibilities for design mechanisms of
generation and analyzing complex heart rate patterns.
