节点文献
甲基莲心碱对离体豚鼠工作心脏的作用
Effects of Neferine on Isolated Working Guinea Pig Hearts
【摘要】 甲基莲心碱(Nef)给药后5min使豚鼠离体工作心脏的左室压(LVP)下降17.9%(P<0.01),左室压瞬时变化速率(±dp/dtmax)分别下降22.6%和11.7%(P均<0.05),左室舒末压(LVEDP)上升48.6%(P<0.01),主动脉流量(ABF)减少48.4%(P<0.01),冠脉流量(CBF)增加10.7%(P<0.05),心率(HR)变化不明显,Nef0.1~10.0μmol/L剂量依赖性地降低LVP、±dP/dtmax、ABF,而CBF在较低剂量范围内是增加的。Nef对离体豚鼠工作心脏各参数的影响类似维拉帕米。结果提示,Nef对心脏收缩性能呈剂量依赖性抑制。减少ABF,而在一定剂量范围内可增加冠脉流量。
【Abstract】 Cardiac function parameters in isolated working guinea pig heart were affect ed by neferine (Nef).Nef 1μmol/L reduced LVP,±dp/dtmax 17.9% (p<0. 01), 22.6% and 11.7% (P<O.05), respectively, increased LVEDP 48.6% P<0.01).and CBF 10.7% (P<0.05).It decreased ABF by 48.4% (P<0.01).HR was not changed significantly.Nef 0.l~10.0μmol/L decreased LVP, ±d p/dtmax, and ABF in an concentration-dependent pat tern. Lower dosage (0.1-1.0μmol/L) increased CBF.Effects of Nef on isolated working heart of guinea pig mimic those of verapamil.The results suggest that Ne f inhibits the car diac contractility,increased CBF in lower concentration.
【Key words】 neferine; isolated working guinea pig heart; cardiac contractility;
- 【文献出处】 同济医科大学学报 ,Acta Universitatis Medictnae Tangji , 编辑部邮箱 ,1994年01期
- 【分类号】R285
- 【被引频次】3
- 【下载频次】48