Effect of If Current Blockade on Contractility of the Isolated Rat Heart after Acute Myocardial Infarction.

IF 0.9 4区 医学 Q4 MEDICINE, RESEARCH & EXPERIMENTAL
A M Kuptsova, A L Zefirov, N I Ziyatdinova, L T Mosolov, T L Zefirov
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引用次数: 0

Abstract

The blockade of hyperpolarization-activated currents (If) (10-9 and 10-5 M) had a multidirectional effect on the left ventricular developed pressure and the maximum contraction rate of the isolated heart in healthy, sham-operated rats, and rats with experimental acute myocardial infarction (AMI). The duration of isolated heart contraction in the presence of the If blocker at both concentrations decreased in the group of healthy animals and did not change in sham-operated rats and rats with AMI. If blockade increased the duration of isolated heart relaxation in all groups. The duration of the contraction cycle under conditions of If blockade (10-9 M) increased in sham-operated rats and rats with AMI and decreased in healthy rats. The maximum concentration of the blocker increased the duration of contraction cycle in all experimental groups.

电流阻断对急性心肌梗死后离体大鼠心脏收缩力的影响。
超极化激活电流(If)(10-9和10-5 M)的阻断对健康大鼠、假手术大鼠和实验性急性心肌梗死(AMI)大鼠的左心室发育压和离体心脏最大收缩率有多向影响。在两种浓度的If阻滞剂存在下,健康动物组的离体心脏收缩持续时间缩短,假手术大鼠和AMI大鼠没有变化。阻断增加了各组孤立性心脏松弛的持续时间。假手术大鼠和AMI大鼠在If阻断(10-9 M)条件下收缩周期持续时间增加,健康大鼠收缩周期持续时间减少。阻滞剂的最大浓度增加了各实验组收缩周期的持续时间。
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来源期刊
Bulletin of Experimental Biology and Medicine
Bulletin of Experimental Biology and Medicine 医学-医学:研究与实验
CiteScore
1.50
自引率
14.30%
发文量
265
审稿时长
2 months
期刊介绍: Bulletin of Experimental Biology and Medicine presents original peer reviewed research papers and brief reports on priority new research results in physiology, biochemistry, biophysics, pharmacology, immunology, microbiology, genetics, oncology, etc. Novel trends in science are covered in new sections of the journal - Biogerontology and Human Ecology - that first appeared in 2005. World scientific interest in stem cells prompted inclusion into Bulletin of Experimental Biology and Medicine a quarterly scientific journal Cell Technologies in Biology and Medicine (a new Russian Academy of Medical Sciences publication since 2005). It publishes only original papers from the leading research institutions on molecular biology of stem and progenitor cells, stem cell as the basis of gene therapy, molecular language of cell-to-cell communication, cytokines, chemokines, growth and other factors, pilot projects on clinical use of stem and progenitor cells. The Russian Volume Year is published in English from April.
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