Table 1.

ECG waveform characteristics of Kcna1 wild-type and null mice

	WT	Null
RR (ms)	90.5 ± 2.1	96.0 ± 6.8
P (ms)	14.8 ± 0.4	15.6 ± 1.2
PR (ms)	30.6 ± 0.2	30.6 ± 0.5
QRS (ms)	10.3 ± 0.3	9.7 ± 0.1
QT (ms)	55.4 ± 1.6	53.9 ± 4.4
QTc (ms)	58.2 ± 1.2	55.0 ± 3.8
Systolic blood pressure (mmHg)	127 ± 11	114 ± 7

Data are given as mean ± SEM and represent n = 4 per genotype, except for blood pressure measurements, which represent n = 2 per genotype. No statistically significant differences were found between genotypes. See Materials and Methods section and supplemental Figure S1 (available at www.jneurosci.org as supplemental material) for detailed description of data collection and analysis.