Figure 4

Temporal relationships between force and intracellular Ca²⁺ signals at elevated K⁺. Intracellular Ca²⁺ (ratio 340/380, RU, blue, A) and force (red, C) signals upon depolarization from 5.9 mM K⁺ to 50 or 124 mM K⁺. Ca²⁺ and force signals consisted of fast and slow components with amplitudes shown in B and D. Results show mean ± s.e.m, n = 6. *, **, ***: P<0.05, 0.01, 0.001 for 124 versus 50 mM K⁺.