Animals, Bupivacaine, Cell Count, Cell Survival, Cells, Cultured, Disease Models, Animal, Echocardiography, Graft Survival, Immunohistochemistry, Ischemic Preconditioning, Myocardial, Male, Muscle, Skeletal, Myocardial Infarction, Myocardium, Myosin Heavy Chains, Rats, Rats, Wistar, Transplantation, Autologous, Ventricular Function, Left