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  • Title: Influence of long-term arotinolol treatment on myocardial mechanics and ventricular myosin isoenzymes in spontaneously hypertensive rats.
    Author: Takeda N, Ohkubo T, Iwai T, Tanamura A, Nagano M.
    Journal: Arch Int Pharmacodyn Ther; 1990; 305():63-8. PubMed ID: 1700686.
    Abstract:
    Alterations in myocardial mechanics and left ventricular myosin isoenzymes by long-term treatment of hypertension with arotinolol were examined in spontaneously hypertensive rats. Approximately 20 mg/kg/day arotinolol was administered to 22-week-old male spontaneously hypertensive rats for 8-10 weeks. There was no significant difference in systolic blood pressure between arotinolol-treated and untreated rats. However, ventricular weight tended to decrease in the arotinolol-treated group, although not significantly. There were no significant differences in isometric developed tension and dT/dtmax of isolated left ventricular papillary muscles between the arotinolol-treated and untreated groups. The left ventricular myosin isoenzyme pattern, on the other hand, obtained by pyrophosphate gel electrophoresis, showed a significant shift toward VM-1 as a result of long-term arotinolol treatment.
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