Statistically significant parameters from Ca²⁺ transient analyses are depicted as box-and-whisker plot (min-max). (A–D) Diastolic [Ca²⁺]_i just before the pulse, the peak level at resting (A), maximum decreasing speed (B), and time to decay₅₀ (C) and decay₉₀ (D), representing the time from peak to 50 and 90% decay of Ca²⁺ transient, were summarized for each animal.