Figure 1
From: Community effect of cardiomyocytes in beating rhythms is determined by stable cells
Schematic diagram of the trajectory of the state variables \({\varphi }_{i}(t)(i=\mathrm{1,2)}\). The circle represents the trajectory of a state variable in the phase space of cardiomyocytes from one firing to the next firing. If cell-2 fires at a time t (\({\varphi }_{2}(t)\) = 0) and cell-1 is not in the refractory period, then cell-1 fires at the retardation time τ after cell-2 fires.
