Table 1.

Averaged Diurnal Changes in Hemodynamic Parameters Between Inbred Mouse Strains at Baseline

Strain Parameter	C3HeB, n=6		SJL, n=6
	Lights On	Lights Off	Lights On	Lights Off
Activity, counts	3.8±0.4	10.0±1.0*	5.1±0.6	8.9±0.6*
Heart rate, beats/min	554±14	627±6*	557±13	621±18*
RR interval, ms	122±4	95±3*	114±5	102±5
Systolic BP, mm Hg	106±2	116±3*	106±2	118±3*
Diastolic BP, mm Hg	81±2	91±1*	80±3	91±4*
Mean pressure, mm Hg	94±2	106±2*	93±2	103±2*

Parameters are shown as mean±SEM. BP indicates blood pressure.

^*P<0.05 vs lights on period (Student t test).