Fig. 4.

a Representative examples of sarcomere shortening during 3 Hz electric stimulation and 5 mM extracellular [Ca²⁺]. Related data of b diastolic sarcomere length, c sarcomere shortening, d time-to-peak and e RT50 of decay. f Relationship of averaged CaT (Fig. 2a) and averaged sarcomere shortening (Fig. 3a). Statistical analysis: two-way ANOVA followed by post-hoc Bonferroni. p-values: ¹0.03, ²< 0.001, ³< 0.001, ⁴< 0.001, ⁵< 0.001, ⁶< 0.001. n = cells derived from 6 animals per group