Kukushkin N I, Bukauskas F F, Sakson M E, Nasonova V V
Biofizika. 1975 Jul-Aug;20(4):687-92.
Excitation propagation in the ventricle and auricle bands of the dog's myocardium has been studied. The anisotropy of stationary valocities and delays of the initiation of extrasistole exciation has been shown: along the fibres the velocity is higher and the delay smaller than across the fibres. The levels of anisotropy of velocities and delays are almost equal in each structure. The strongest anisotropy of delays and velocities (-4,5) is observed in the ventricle muscle layer; the weakest (1,7)-in a specialized layer. The anisotropy of velocities and delays is the greater, the greater is the electrotone anisotropy. A new mechanism of extrasistole initiation (reentry) in the system homogenous by the membrane properties, but with anisotropy of intercellular bonds is considered.
对犬心肌心室和心房带中的兴奋传播进行了研究。已显示出室性期外收缩兴奋起始的静态速度和延迟的各向异性：沿纤维方向速度更高，延迟比横穿纤维时更小。在每个结构中，速度和延迟的各向异性水平几乎相等。在心室肌层中观察到最强的延迟和速度各向异性（-4.5）；在特殊层中最弱（1.7）。速度和延迟的各向异性越大，电紧张各向异性就越大。考虑了在膜特性均匀但细胞间连接具有各向异性的系统中，室性期外收缩起始（折返）的一种新机制。
