FIG. 4.
Intracellular Ca++ transient properties of cardiomyocytes isolated from young or old C57BL6 and LID mouse hearts. (A) Resting fura-2 fluorescence intensity (FFI). (B) Fura-fluorescence intensity change (ΔFFI) in response to electrical stimuli. (C) Single-exponential Ca++ transient decay rate. (D) Biexponential Ca++ transient decay rate. Mean ± SEM, n = 105–112 cells/group, (*) p < 0.05 versus the C57BL/6 young group, (#) p < 0.05 versus the C57BL/6 old group.
