Fig. 5. Summarized data depicting the effect of Na+and Ca2+removal (0 Na+/0 Ca2+) or elevated Na+(180 Na+/1.2 Ca2+) on [Ca2+]idecay after exposure to caffeine in normal (N) and diabetic (D) cardiomyocytes. * P < 0.05 versus normal. # P < 0.05 versus control. ‡ break point in y axis. n = at least 9 cells from 3 different hearts for each group.