The effect of certain β-adrenoceptor antagonists on overdrive suppression

Abstract

1. Propranolol, as the racemate and the (+)- and (-)-isomers (400 μg/l.) and practolol (50 mg/l.) were tested for their effects on atrial and ventricular rates and on the duration of overdrive suppression (ODI) in isolated perfused cat hearts with surgically-induced heart block

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