Chronic Therapy with Nipradilol, a β : Adrenergic Blocker, Attenuated Left Ventricular Remodeling Following Myocardial Infarction in Rats

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We determined whether chronic treatment with nipradilol, a β-blocker with vasodilating action, reduces left ventricular cavity dilation (LV remodeling) following myocardial infarction and improves cardiac performance. Myocardial infarction was produced by coronary artery ligation in 16-week-old female rats and then the rats were treated for 3-4 months with nipradilol (10 mg/kg/day) or vehicle (0.5% carboxymethylcellulose). The effect of nipradilol on LV remodeling was evaluated by assessing the left ventricular end-diastolic volume index (LVEDVI)and passive pressure-volume relation curve. Since LVEDVI depends on the infarct size, LVEDVI was compared between the vehicle and nipradilol-treated rats with similar infarct size (10-40%). At 3-4 months after myocardial infarct production, the left ventricular end-diastolic volume index in the vehicle-treated rats with myocardial infarction was significantly increased, compared with that in the sham-operated rats without infarction. The nipradilol-treated rats had a significantly smaller left ventricular volume index than the vehicle-treated rats (2.04±0.16 ml/kg in the vehicle-treated group vs 1.36±0.10 ml/kg in the nipradilol-treated group, P<0.01). The maximum cardiac index achieved by volume loading as an index of cardiac performance was significantly greater in the nipradilol group than the vehicle group (254.5 ± 12.6 ml/min kg in the vehicle group vs 347.9 ± 20.2 ml/min kg in the nipradilol group, P <0.01). These results suggest that chronic treatment of nipradilol attenuated left ventricular cavity dilation after myocardial infarction and improved cardiac performance.

収録刊行物

  • The Japanese journal of pharmacology

    The Japanese journal of pharmacology 74(2), 171-178, 1997-06-01

    The Japanese Pharmacological Society

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各種コード

  • NII論文ID(NAID)
    10008678904
  • NII書誌ID(NCID)
    AA00691188
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00215198
  • NDL 記事登録ID
    4260346
  • NDL 雑誌分類
    ZS51(科学技術--薬学)
  • NDL 請求記号
    Z53-D199
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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