Fig. 6From: Increased O2 consumption in excitation–contraction coupling in hypertrophied rat heart slices related to increased Na+–Ca2+ exchange activityaI–V relationship of NCX current (INCX) measured in myocytes. The current density, which was normalized to the membrane capacitance, was significantly larger in HYP (filled circlesn = 17) than in CONT (open circlesn = 8). b Time-dependent inactivation decay of INCX in a CONT (gray circles) and a HYP (black circles) myocyte stimulated with 2 mM Ca2+ in Na+ free Tyrode solution. c Mean time constants of CONT myocytes (open columnn = 4) and HYP (solid columnn = 7) myocytes. A single exponential function was fit to the current decay. *P < 0.01 vs. CONT myocytes. **P < 0.005 vs. CONT myocytesBack to article page