Table 4.

Echocardiographic assessments

		CON	IUGR	PNGR	IPGR
HR, (beats/min)	PreHx	410 ± 32	393 ± 38	432 ± 49	417 ± 42
	PostAc. Hx	402 ± 48	402 ± 38	455 ± 38	471 ± 28*
	PostChr. Hx	408 ± 27	397 ± 44	419 ± 28	389 ± 15
VST, mm	PreHx	1.4 ± 0.2	1.5 ± 0.1	1.3 ± 0.1	1.3 ± 0.2
	PostAc. Hx	1.3 ± 0.1	1.4 ± 0.1	1.3 ± 0.2	1.4 ± 0.1
	PostChr. Hx	1.3 ± 0.05	1.6 ± 0.3	1.4 ± 0.2	1.3 ± 0.2
PWT, mm	PreHx	1.4 ± 0.1	1.5 ± 0.1	1.3 ± 0.1‡	1.4 ± 0.1
	PostAc. Hx	1.5 ± 0.1	1.4 ± 0.1	1.3 ± 0.2	1.4 ± 0.1
	PostChr. Hx	1.4 ± 0.2	1.5 ± 0.2	1.3 ± 0.2	1.3 ± 0.1
ESD, mm	PreHx	4.3 ± 0.6	4 ± 0.5	4 ± 0.4‡	4 ± 0.4
	PostAc. Hx	4.4 ± 0.6	4.3 ± 0.4	4.2 ± 0.4	3.4 ± 0.4*
	PostChr. Hx	4.7 ± 0.2	4 ± 0.6	4 ± 0.3	4.5 ± 0.5*
EDD, mm	PreHx	7.5 ± 0.6	7.2 ± 0.3	7.3 ± 0.5	6.7 ± 0.4
	PostAc. Hx	7.3 ± 0.4	7.3 ± 0.7	7 ± 0.3	6.4 ± 0.4
	PostChr. Hx	7.3 ± 0.4	6.7 ± 0.7*	6.8 ± 0.3	6.9 ± 0.3
VCF, cir/s	PreHx	6.7 ± 0.7	6.7 ± 1.3	7.2 ± 0.8	6.7 ± 1
	PostAc. Hx	6.2 ± 1.3	6.4 ± 0.5	6.8 ± 0.9	7.6 ± 0.7
	PostChr. Hx	5 ± 0.8	6.5 ± 1.3	6.8 ± 0.8	5.1 ± 0.8*
LVM, mg	PreHx	705 ± 131	714 ± 73	622 ± 93	573 ± 100‡
	PostAc. Hx	678 ± 102	677 ± 115	608 ± 114	544 ± 88
	PostChr. Hx	662 ± 44	662 ± 145	594 ± 69	571 ± 103
LVM/BW	PreHx	3.3 ± 0.5	3.1 ± 0.4	3.2 ± 0.6	3.5 ± 0.5
	PostAc. Hx	3.5 ± 0.5	3.1 ± 0.5	3.4 ± 0.6	3.6 ± 0.5
	PostChr. Hx	2.8 ± 0.3*	3 ± 0.6	3 ± 0.1	3 ± 0.5*

Heart rate (HR), ventricular septal thickness (VST), posterior wall thickness (PWT), end systolic dimension (ESD), end diastolic dimension (EDD), velocity of circumferential fiber (VCF), left ventricular mass and left ventricular mass (LVM) to body weight (BW) ratio. Echocardiographic assessments at baseline (prehypoxia; preHx), after 2 days of hypoxia (postacute; postAc. Hx ) and after 7 days of hypoxia (postchronic; postChr. Hx) in 4 experimental groups. Values are means ± SE; n = 6 per treatment and per group. Fisher's PLSD

^*P < 0.05 vs. prehypoxia,

^‡P < 0.05 vs. CON prehypoxia.