Protein expression in the normal ventricle. (A) Vascular endothelial growth factor (VEGF) expression was increased in the 4-week group, *p = 0.003. (B) Expression of phospho-endothelial nitric oxide synthase (eNOS) was increased in the 4-week group. Presented as the ratio of phospho-eNOS to total eNOS expression, †p = 0.02. (C) The level of phospho-extracellular signal regulated kinase (ERK) was increased at 7 weeks, ‡p = 0.001. (D) The level of apoptosis inducing factor (AIF) was increased at 7 weeks, §p = 0.02. (E) Expression of heat shock protein (HSP) 27 was increased in the 7-week group, ||p = 0.001. (F) HSP 90 expression was increased in the 7-week group, ¶p = 0.01.