Table 2.

Effect of 25 μM Dantrolene on Intramembrane Charge Movement and on the L-Type Calcium Current

	Charge movement			ICa
	Qmax	V′	k	Gmax	V′	k	ECa
	nCμF−1	mV	mV	SF−1	mV	mV	mV
Control	23.8 ± 2.4	−38.9 ± 2.3	13.1 ± 1.1	200 ± 16	−10.8 ± 1.5	7.1 ± 0.5	73.2 ± 2.6
Dantrolene	27.6 ± 3.9	−33.5 ± 3.3	15.8 ± 1.0	143 ± 8	−8.2 ± 1.5	6.5 ± 0.7	80.1 ± 4.3

Parameter values obtained by fitting or to the voltage dependence of intramembrane charge movement or L-type calcium current, respectively.