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  • Title: Reaction patterns of the myocardial interstitium in different models of cardiac hypertrophy--stereological investigations.
    Author: Mall G, Mattfeldt T, Rambausek M, Hasslacher C, Mann J, Ritz E.
    Journal: Gegenbaurs Morphol Jahrb; 1989; 135(1):151-8. PubMed ID: 2525497.
    Abstract:
    Several experimental models of cardiac hypertrophy were investigated in rats: 1. mild hypertrophy induced by physical exercise (18 weeks), 2. mild hypertrophy induced by renovascular hypertension (24 weeks), 3. moderate hypertrophy induced by renovascular hypertension in diabetic and non-diabetic animals (8 weeks), 4. moderate hypertrophy induced by renovascular hypertension in diabetic and non-diabetic animals (12 weeks), 5. moderate hypertrophy induced by thyroxin application (4 weeks), 6. mild hypertrophy in chronic uremia (5/6 nephrectomy, 3 weeks). It is concluded from quantitative stereological parameters of the left ventricular papillary muscles that 1. in hypertrophic hearts myocardial blood flow and oxygen consumption, respectively, rather than the size of muscle fibres determine the capillary supply of the myocardium, 2. interstitial fibrosis occurs in hypertrophy induced by chronic pressure overload and depends on degree and duration of hypertension, 3. the extent of interstitial fibrosis in hypertension is magnified by diabetes mellitus, and 4. the interstitial fibrosis which occurs in chronic uremia is not caused by hypertension.
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