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. Author manuscript; available in PMC: 2009 Jul 15.
Published in final edited form as: Circ Res. 2008 Jul 3;103(3):279–288. doi: 10.1161/CIRCRESAHA.108.175919

Figure 6.

Figure 6

Threshold [Ca2+]m required to prevent net NADH oxidation. Up to a threshold concentration of [Ca2+]m (dotted lines in A–B), the extent of NADH oxidation at the end of the 100-second stimulation period was linearly correlated with [Ca2+]m (A, diastolic rhod-2 F/F0; B, systolic rhod-2 F/F0). Beyond the threshold, further increases [Ca2+]m did not alter the NADH balance. Filled and open symbols: 5 and 15 mmol/L Na+ groups, respectively.