Table 1

Electrophysiological intervals in wild-type (WT) and Mecp2Null/Y mice at 2 to 3 months old. Data are expressed as means ± SEM. RR, time interval between two consecutive RR waves; PQ, interval from the beginning of the P wave to the peak of the Q wave; QRS, duration of the interval between beginning of Q wave to peak of S wave; QT, interval from beginning of Q wave to the end of the T wave; QTc, QT interval corrected for heart rate; SCL, sinus cycle length time; AV, interval from the beginning of the P wave to the beginning of the QRS complex.

WT (n = 11)Mecp2Null/Y (n = 12)
RR (ms)118.3 ± 4.6113.8 ± 3.0
PQ (ms)35.3 ± 1.535.3 ± 1.6
QRS (ms)8.9 ± 0.310.6 ± 0.4*
QT (ms)37.3 ± 1.749.8 ± 2.0*
QTc (ms)53.7 ± 2.267.6 ± 1.8
SCL (ms)114.2 ± 3.4117.9 ± 3.4
AV (ms)37.5 ± 1.539.5 ± 1.9

*P < 0.01 versus wild type.

P < 0.001 versus wild type.