辛伐他汀对大鼠心肌梗死后心室电重构及室颤阈值的影响
目的探讨心肌梗死(MI)后甲基羟戊二酰辅酶A还原酶抑制剂辛伐他汀对心室电重构及室颤阈值的影响。方法用结扎冠状动脉前降支的方法制备大鼠MI模型,将存活的大鼠随机分为MI组(n=8)、中等剂量辛伐他汀组(M-SIM组,n=8)、大剂量辛伐他汀组(H-SIM组,n=8);另设假手术组(Sham组,n=8),在相同位置只挂线不结扎。MI 24 h后,M-SIM组和H-SIM组分别以1 mg.kg-1.d-1和10 mg.kg-1.d-1辛伐他汀(溶于蒸馏水中)灌胃连续4周;MI组和Sham组则给予同体积蒸馏水灌胃。MI 4周后行超声心动图检查及在体电生理检查。结果各组大鼠MI前QTc间期比较,差异无统...
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| Published in | 上海交通大学学报（医学版） Vol. 31; no. 4; pp. 425 - 428 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
上海交通大学附属第六人民医院心内科,上海,200233
2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-8115 |
| DOI | 10.3969/j.issn.1674-8115.2011.04.009 |
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| Abstract | 目的探讨心肌梗死(MI)后甲基羟戊二酰辅酶A还原酶抑制剂辛伐他汀对心室电重构及室颤阈值的影响。方法用结扎冠状动脉前降支的方法制备大鼠MI模型,将存活的大鼠随机分为MI组(n=8)、中等剂量辛伐他汀组(M-SIM组,n=8)、大剂量辛伐他汀组(H-SIM组,n=8);另设假手术组(Sham组,n=8),在相同位置只挂线不结扎。MI 24 h后,M-SIM组和H-SIM组分别以1 mg.kg-1.d-1和10 mg.kg-1.d-1辛伐他汀(溶于蒸馏水中)灌胃连续4周;MI组和Sham组则给予同体积蒸馏水灌胃。MI 4周后行超声心动图检查及在体电生理检查。结果各组大鼠MI前QTc间期比较,差异无统计学意义(P>0.05)。手术4周后与Sham组相比,MI组QTc间期明显延长(P<0.05),有效不应期(ERP)缩短,ERP-频率曲线下移;MI组诱发的室性快速心律失常(IVT)发生率升高,室颤阈值明显降低(均P<0.05);在MI组,S1S1间期为90 ms和80 ms时的ERP较S1S1间期为120 ms时明显延长(P<0.05)。M-SIM组及H-SIM组QTc间期均较MI组缩短(P<0.05),ERP-频率曲... |
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| AbstractList | 目的探讨心肌梗死(MI)后甲基羟戊二酰辅酶A还原酶抑制剂辛伐他汀对心室电重构及室颤阈值的影响。方法用结扎冠状动脉前降支的方法制备大鼠MI模型,将存活的大鼠随机分为MI组(n=8)、中等剂量辛伐他汀组(M-SIM组,n=8)、大剂量辛伐他汀组(H-SIM组,n=8);另设假手术组(Sham组,n=8),在相同位置只挂线不结扎。MI 24 h后,M-SIM组和H-SIM组分别以1 mg.kg-1.d-1和10 mg.kg-1.d-1辛伐他汀(溶于蒸馏水中)灌胃连续4周;MI组和Sham组则给予同体积蒸馏水灌胃。MI 4周后行超声心动图检查及在体电生理检查。结果各组大鼠MI前QTc间期比较,差异无统计学意义(P>0.05)。手术4周后与Sham组相比,MI组QTc间期明显延长(P<0.05),有效不应期(ERP)缩短,ERP-频率曲线下移;MI组诱发的室性快速心律失常(IVT)发生率升高,室颤阈值明显降低(均P<0.05);在MI组,S1S1间期为90 ms和80 ms时的ERP较S1S1间期为120 ms时明显延长(P<0.05)。M-SIM组及H-SIM组QTc间期均较MI组缩短(P<0.05),ERP-频率曲... R542.22; 目的 探讨心肌梗死(MI)后甲基羟戊二酰辅酶A还原酶抑制剂辛伐他汀对心室电重构及室颤阈值的影响.方法 用结扎冠状动脉前降支的方法 制备大鼠MI模型,将存活的大鼠随机分为MI组(n=8)、中等剂量辛伐他汀组(M-SIM组,n=8)、大剂量辛伐他汀组(H-SIM组,n=8);另设假手术组(Sham组,n=8),在相同位置只挂线不结扎.MI 24 h后,M-SIM组和H-SIM组分别以1 mg·kg<'-1>·d<'-1>和10 mg·kg<'-1>·d<'-1>辛伐他汀(溶于蒸馏水中)灌胃连续4周;MI组和Sham组则给予同体积蒸馏水灌胃.MI 4周后行超声心动图检查及在体电生理检查.结果 各组大鼠MI前QTc间期比较,差异无统计学意义(P>0.05).手术4周后与Sham组相比,MI组QTc间期明显延长(P<0.05),有效不应期(ERP)缩短,ERP-频率曲线下移;MI组诱发的室性快速心律失常(IVT)发生率升高,室颤阈值明显降低(均P<0.05);在MI组,slsl间期为90 ms和80 ms时的ERP较SlSl间期为120 ms时明显延长(P<0.05).M-SIM组及H-SIM组QTc间期均较MI组缩短(P<0.05),ERP-频率曲线上移,各SlSl间期时对应的ERP值差异无统计学意义(P>0.05);且IVT发生率明显降低,室颤阈值明显升高(均P<0.05).M-SIM组与H-SIM组间各指标比较,差异无统计学意义(P>0.05).结论 辛伐他汀能改善大鼠MI后电生理重构,调整频率依赖适应性变化,提高室颤阈值而改善MI后室性心律失常. |
| Author | 李帅 李京波 朱伟 余涛 顾北音 魏盟 |
| AuthorAffiliation | 上海交通大学附属第六人民医院心内科 |
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| Keywords | 心肌梗死 室颤阈值 辛伐他汀 电重构 有效不应期 |
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| Title | 辛伐他汀对大鼠心肌梗死后心室电重构及室颤阈值的影响 |
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