Introduction. Hypertension with left ventricular hypertrophy (LVH) is a major independent risk factor for cardiovascular-related morbidity. Diet plays an essential role in the prevention and treatment of chronic cardiovascular disease. The aim of our study was to analyze the influence of 10-week diets consisting of different high fats and carbohydrates on the myocardium in spontaneously hypertensive rats (SHR). Materials and methods. The SHR (n=34) and WKY (n=34) were randomly divided into five groups (n=6 or 7 per group). For 10 weeks, the control group was fed the standard diet; the experimental groups were fed the standard chow diet with the different fats and sucrose (11% of the calorie intake). Systolic blood pressure (SBP) was measured before the experiment and 10 weeks after by the non-invasive tail-cuff method. After the experiment, the animals were humanely sacrificed. The heart specimens after routine processing were stained with hematoxylin and eosin. We determined the thickness of the left ventricle and the number of cardiomyocy
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