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The effect of prolonged pentobarbital anaesthesia was tested on the dog heart in situ by means of His bundle electrography and programmed electrical stimulation, monophasic action potential recordings from the right ventricle and measurements of peak dp/dt obtained by Millar tip transducer in the left ventricle. Sixteen dogs were used. Immediately after(More)
In pentobarbital anaesthetised dogs, melperone (a neuroleptic butyrophenone) reduced mean aortic blood pressure and at lower doses (0.5 and 2.5 mg . kg-1) increased the heart rate. By means of His bundle electrography and programmed electrical stimulation, conduction velocity and refractoriness were measured at different frequencies of stimulation (170,(More)
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