title: [Cardioprotection of ramipril and BQ-123 against myocardial ischemia/reperfusion injury in vivo in rats].
abstract: OBJECTIVE
  To study the protective effects of ramipril in combination with BQ-123 on myocardial ischemia/reperfusion (I/R) injury in vivo in anesthetized rats.
  
  
  METHODS
  Healthy male Wistar rats were divided into 5 groups randomly and subjected to 30 min of myocardial ischemia followed by 120 min reperfusion. Ramipril, BQ-123 and their combination were given to rats respectively. To observe the protection of their combination against myocardial I/R injury. HR, MAP and the change of ST-segment were observed. Ventricular arrthymias were monitored. The activity of creatine kinase (CK) and lactate dehydrogenase (LDH) in plasma, the infarct size and morphologic change were examined.
  
  
  RESULTS
  Compared with I/R group, the elevation of ST-segment was decreased. Onsets of VPC and VT were delayed, durations of VPC and VT were shortened, especially their combination. Incidences of VPC, VT and VF were decreased. Activity of plasma CK and LDH was decreased, especially their combination. IS, IS/AAR and the morphology of myocardium were improved, especially their combination.
  
  
  CONCLUSIONS
  Ramipril, BQ-123 and combined using these two agents protected myocardium from I/R injury in vivo. The protective effects on delaying onset of VA, shortening duration of VA, decreasing the activities of CK and LDH, decreasing infrarct size and improving morphology of myocardium were better than using ramipril and BQ-123 alone.
authors.affiliation: Pharmacology Department of Basic College, Tianjin Medical University, Tianjin 300070, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhuo-Jun
authors.initials: ZJ
authors.lastname: Huang
authors.forename: Jun-Qiu
authors.initials: JQ
authors.lastname: Song
authors.forename: Yan-Na
authors.initials: YN
authors.lastname: Wu
authors.forename: Yan-Xia
authors.initials: YX
authors.lastname: Liu
mesh_terms: D000818:Animals; D001145:Arrhythmias, Cardiac / Q000517:prevention & control; D002316:Cardiotonic Agents / Q000494:pharmacology*; D003402:Creatine Kinase / Q000097:blood; D004357:Drug Synergism; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008297:Male; D015428:Myocardial Reperfusion Injury / Q000517:prevention & control*; D010456:Peptides, Cyclic / Q000494:pharmacology*; D017257:Ramipril / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D002316:Cardiotonic Agents; D010456:Peptides, Cyclic; D007770:L-Lactate Dehydrogenase; D003402:Creatine Kinase; D017257:Ramipril; C072247:cyclo(Trp-Asp-Pro-Val-Leu)