Table 2.

Morphometric parameters of left ventricular remodelling investigated at the end of each of the four periods of follow-up: 1, 3, 7, and 28 days

Groups	SH 1	MI 1	SH 3	MI 3	SH 7	MI 7	SH 28	MI 28
IS (%)		40 ± 4		37 ± 3		37 ± 5		39 ± 5
LVEI	0.22 ± 0.03	0.47 ± 0.08*	0.25 ± 0.03	0.64 ± 0.06*	0.26 ± 0.04	1.32 ± 0.27*††	0.25 ± 0.04	1.44 ± 0.38*
SE lesion (%)	0.35 ± 0.25	8.08 ± 3.36*	0.24 ± 0.15	7.04 ± 2.71*	0.32 ± 0.32	2.82 ± 1.37*††	0.52 ± 0.26	0.63 ± 0.21*†††
VW (mg/g)	5.45 ± 0.23	4.89 ± 0.22	4.69 ± 0.26	3.65 ± 0.30	3.74 ± 0.12	4.00 ± 0.09	3.68 ± 0.13	3.84 ± 0.18
Myocyte Ø (μm)	10.69 ± 0.09	11.25 ± 0.26*	9.70 ± 0.31	10.28 ± 0.38*†	9.88 ± 0.19	11.67 ± 0.48*††	9.56 ± 0.21	11.02 ± 0.41*
Body weight (g)	302 ± 3	301 ± 4	300 ± 3	302 ± 5	322 ± 5	310 ± 3	376 ± 6	380 ± 11

SH, sham group; MI, myocardial infarction group; IS, infarct size; LVEI, left ventricular expansion index; VW, ventricular weight; Ø, diameter; SE, subendocardial.

^*P < 0.05 vs. SH.

^†P < 0.05 vs. MI 1

^††P < 0.05 vs. MI 3

^†††P < 0.05 vs. MI 7.