Table 1.

Morphometry and cardiac function parameters in 1, 4, 7, and 10 days old animals

Day	Protocol	n	Body weight (g)	Heart weight (mg)	HW/BW (mg/g)	DF (g)	Df/dt max (g/min)
1	Controls	12	6.67 ± 0.23	34.22 ± 1.33	5.15 ± 0.15	1.45 ± 0.11	35.25 ± 2.50
	5-HD	15	6.78 ± 0.22	33.05 ± 1.82	4.84 ± 0.16	1.40 ± 0.12	37.51 ± 4.47
	IPoC 5 × 10 s	9	6.07 ± 0.30	24.96 ± 0.70	4.10 ± 0.08	1.29 ± 0.07	32.63 ± 1.24
	Nitrates/3-NT	10	6.08 ± 0.28	26.40 ± 1.91	4.31 ± 0.14	-	-
4	Controls	9	9.16 ± 0.46	42.92 ± 2.01	4.73 ± 0.20	2.08 ± 0.13	48.48 ± 2.01
	5-HD	8	8.98 ± 0.56	45.76 ± 2.85	5.14 ± 0.23	2.28 ± 0.21	58.85 ± 5.37
	IPoC 5 × 10 s	8	10.55 ± 0.28	54.11 ± 3.20	5.15 ± 0.18	1.97 ± 0.15	51.92 ± 3.43
7	Controls	8	15.50 ± 0.81	72.26 ± 2.81	4.70 ± 0.10	3.08 ± 0.22	78.96 ± 4.70
	5-HD	6	17.77 ± 0.58	81.12 ± 2.15	4.58 ± 0.16	2.99 ± 0.29	71.44 ± 4.28
	IPoC 5 × 10 s	8	15.16 ± 0.36	71.35 ± 2.91	4.72 ± 0.21	2.99 ± 0.16	74.63 ± 3.41
10	Controls	8	20.01 ± 1.04	98.55 ± 4.02	4.99 ± 0.31	3.54 ± 0.23	80.96 ± 7.62
	5-HD	12	20.28 ± 0.64	92.76 ± 2.98	4.62 ± 0.19	3.59 ± 0.24	83.44 ± 5.41
	IPoC 5 × 10 s	10	18.81 ± 0.50	93.3 ± 2.53	4.97 ± 0.13	4.43 ± 0.30	100.30 ± 8.68
	IPoC 5 × 10 s + 5-HD	9	18.92 ± 0.37	86.77 ± 2.08	4.56 ± 0.13	5.22 ± 0.26	129.52 ± 5.46

HW/BW heart weight-to-body weight ratio, DF developed force, Df/dt max the most force rising ratio, SEM standard error of mean