The analytical theory of our earlier study (Mortensen et al., 2021, Math. Med. Biol., 38, 106–131) is extended to address the outstanding cases of fibroblast barrier distribution and myocyte strait distribution. In particular, closed-form approximations to the resting membrane potential and to the critical parameter values for propagation are derived for these two non-uniform fibroblast distributions and are in good agreement with numerical estimates.

中文翻译：

---

附录：心肌细胞-成纤维细胞耦合心房组织模型中的动作电位传播和阻滞

我们早期研究的分析理论 (Mortensen et al., 2021, Math. Med. Biol., 38, 106–131) 被扩展到解决成纤维细胞屏障分布和肌细胞海峡分布的突出案例。特别是，对于这两种不均匀的成纤维细胞分布，得出了静息膜电位和传播的关键参数值的闭合形式近似值，并且与数值估计值非常吻合。