Table 1.

Lead II ECG data (mean ± 1 SD) and range for intervals, wave amplitude, and heart rate from 104 clinically normal Japanese macaques

	Macaca fusucata
	male	female	Macaca fascicularis
Heart rate (bpm)	157 ± 19	159 ± 21	168 ± 22
QRS axis (°)	66 ± 22	75 ± 18	55 ± 41
QRS width (msec)	44 ± 7	43 ± 8	36 ± 6
P width (msec)	37 ± 18	41 ± 18	50 ± 7
PR interval (msec)	84 ± 13	80 ± 11	89 ± 11
QT interval (msec)	205 ± 18	213 ± 17	202 ± 30
QTcb interval (msec)	329 ± 20	339 ± 19	209 ± 30
QTcf interval (msec)	281 ± 19	290 ± 19	282 ± 32
P wave amplitude (mV)	0.11 ± 0.88	0.13 ± 0.07	0.11 ± 0.02
R wave amplitude (mV)	1.12 ± 0.42	1.25 ± 0.38	0.69 ± 0.23
T wave amplitude (mV)	0.14 ± 0.11	0.12 ± 0.33	0.19 ± 0.10

QTcb, QT interval as corrected by using the formula of Bazett; QTcf, QT interval corrected by using the formula of Fridricia.

Data for reference range for M. fascicularis were obtained from reference 21, except for T wave amplitude (reference 1).