Fig. 4From: A master stability function approach to cardiac alternansa Stability region of the synchronous network state as a function of the luminal coupling strength \(\sigma _{\text {SR}}^{-1}\) and the pacing period Tp for a network of 4 CRUs. The synchronous state is unstable in the region labeled U and stable in the region denoted by S. The green line indicates the pacing period at which the period-1 orbit of a single CRU loses stability. b Stability regions of individual eigenvectors. The corresponding eigenvectors are shown in blue, and the corresponding eigenvalues are listed. The green line is the same as in (a)Back to article page