EFFECTS OF VERAPAMIL ON POSTEXTRASYSTOLIC POTENTIATION

被引:0
|
作者
MOOSS, AN
HILLEMAN, DE
RYSAVY, J
SKETCH, MH
机构
[1] Cardiac Center, Creighton University, Omaha
关键词
D O I
10.1378/chest.101.5.1438
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
To assess the effects of verapamil on postextrasystolic potentiation (PESP), contrast left ventriculography was performed in ten healthy anesthetized dogs before and after the intravenous administration of verapamil, 0.1 mg/kg. During the contrast ventriculography, a single atrial premature stimulus was introduced. Ejection fractions of a control beat and postpremature beat were measured before and after verapamil. Before verapamil, the mean ejection fractions of the control beat and the postpremature beat were 60 +/- 10 percent and 67 +/- 10 percent, respectively (p < 0.05). Following the administration of verapamil, the mean ejection fraction of the control beat decreased from 60 +/- 10 percent to 55 +/- 11 percent (p < 0.05). However, the mean ejection fraction of the postpremature beats increased when compared with the control beats following intravenous verapamil (65 +/- 8 percent and 55 +/- 11 percent, respectively; p < 0.05). These results suggest that PESP is not inhibited by the administration of intravenous verapamil.
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页码:1438 / 1441
页数:4
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