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VerapamilPlacental Transfer and Effects on Maternal and Fetal Hemodynamics and Atrioventricular Conduction in the Pregnant Ewe

 

作者: S. Murad,   K. Tabsh,   K. Conklin,   G. Shilyanski,   F. Ziadlourad,   P. Kapur,   W. Flacke,  

 

期刊: Anesthesiology  (OVID Available online 1985)
卷期: Volume 62, issue 1  

页码: 49-53

 

ISSN:0003-3022

 

年代: 1985

 

出版商: OVID

 

关键词: Anesthesia: obstetric;Ions: calcium, blockers;Pharmacology: verapamil;Placenta: transfer, verapamil

 

数据来源: OVID

 

摘要:

Verapamil may have application in the field of obstetrics for treatment of maternal and fetal tachyarrhythmias. This study was performed to assess the maternal and fetal hemodynamic effects of this drug, as well as to determine its placental transfer and effects on maternal and fetal atrioventricular conduction in the pregnant ewe. Verapamil, 0.2 mg/kg, administered intravenously over 3 min, resulted in a transient decrease in maternal mean and diastolic blood pressures. There was, however, no significant change in fetal systolic, diastolic, and mean blood pressures. Maternal and fetal heart rates also were unchanged throughout the experiment. Atrioventricular conduction, assessed by measurement of PR intervals, was prolonged in both the ewe (41%) and the fetus (78%). Placental transfer of verapamil was limited, as shown by the umbilical vein to uterine artery drug concentration ratios of 0.35–0.45 throughout most of the experiment. Fetal hepatic extraction of the drug appeared to be substantial, since the drug concentration in the fetal carotid artery was less than that of the umbilical vein at 1, 3, and 5 min after drug injection.

 

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