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Active force (% of baseline value) variation of left ventricle papillary muscle of healthy and diabetic rats (Panel A) or pretreated (Panel B) with atorvastatin (50 mg kg-1.day-1) during 15 days (8 rats per group) on in vitro inotropic response to isoproterenol. Data are expressed as mean ± SD. P values refers to comparison between healthy and diabetic rats. NS = non-significant.
