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Figure 6 Membrane currents of a hyperthyroid (A) and a control (B) pulmonary vein (PV) cardiomyocyte. The ionic currents were elicited from a holding potential of –40 mV to test potentials ranging from –20 mV to –120 mV. The inset shows the various clamp protocols. C shows the measured current-voltage curves of the two cells. The hyperthyroid and control PV cardiomyocytes had similar electrical capacitance.
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