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Objectives: The aim of this study was to evaluate the beneficial effect of aqueous extract of garlic (Allium sativum) on the morphology of myocardium of left ventricle in high salt-fed diet Wistar rats. Methods: Twenty-five female Wistar rats weighing 130–180 g were divided into five groups (n=5, each). Group A were fed with standard laboratory pellets, while Groups B, C, D and E were fed a high-salt diet for five weeks. Following this, daily administration of aqueous garlic extract was done orally to Groups C, D and E, respectively for 3 weeks. The left ventricle of the heart was excised, processed in paraffin wax and stained with haematoxylin and eosin, Masson’s trichrome and Verhoeff-Van Gieson stains. One-way ANOVA was used to analyze data, followed by Student-Newman-Keuls (SNK) test for multiple comparisons. Results: We found that the relative change in heart weight in the high salt-fed group was lower, though not statistically significant (p=0.175) than the control group. There was significant increase (p<0.05) in plasma levels of sodium and potassium in Group B when compared with control, but this was dose-dependently reversed by aqueous garlic extract in Groups D and E. Histological and histochemical results revealed morphological alterations in the left ventricle of Group B which were also reversed in Groups D and E. Conclusion: The results of this study indicate that high salt diet-induced histochemical and histomorphological changes in the left ventricle of Wistar rats were significantly reversed by oral administration of garlic extract. Keywords: garlic; heart; high salt diet; ventricle

Effects of aqueous extract of garlic (Allium sativum) on the left ventricle myocardium of high salt-fed adult Wistar rats