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- W2171438349 abstract "Abstract The aim of the present study was to investigate the antiarrhythmic potential of verapamil in the late myocardial infarction period in conscious dogs. Verapamil was administered in cumulative doses (0·3 + 0·3 mg kg−1). The drug significantly lowered systolic and diastolic blood pressure after both doses. ECG signals showed short-lasting significant decrease in RR and QT intervals together with an increase in QTc interval. The parameters of the atrioventricular conduction system (PQ interval, 2:1 AV-conduction point) were significantly prolonged over the entire observation period. Ventricular effective refractory periods remained unaltered. In contrast to results obtained during acute ischaemia and in the first week thereafter, the present study demonstrates that verapamil moderately increases intraventricular conduction time 14 days after acute myocardial infarction. Verapamil prevented the induction of arrhythmias by programmed electrical stimulation (PES) in only 11% of all induction attempts. The lack of lengthening of refractory periods in the presence of a prolongation of intraventricular conduction time may be responsible for the poor antiarrhythmic efficacy. We conclude that verapamil is only of negligible value for the management of PES-induced ventricular arrhythmias in the late myocardial infarction period." @default.
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- W2171438349 date "1992-04-01" @default.
- W2171438349 modified "2023-09-27" @default.
- W2171438349 title "Efficacy of Verapamil against Ventricular Arrhythmias Induced by Programmed Electrical Stimulation in the Late Myocardial Infarction Phase in Dogs" @default.
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- W2171438349 doi "https://doi.org/10.1111/j.2042-7158.1992.tb03619.x" @default.
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