the degree of shift was five-fold ( positive chronotropic response ) and 20-fold ( decrease in diastolic blood pressure ) in the oxyfedrine group and 10- and 80-fold , respectively , in the propranolol group.4 in contrast to the partial blockade of the effects of isoprenaline , the haemodynamic response to oxyfedrine was largely unaltered , both in the cats pretreated with propranolol and in those pretreated with oxyfedrine .
C1372804
positive chronotropic
C0022245
isoprenaline