in the anesthetized open-chest guinea pig , ibopamine ( 10-300 micrograms/kg , i.v . ) , epinine ( 10-100 micrograms/kg , i.v . ) and dopamine ( 10-300 micrograms/kg , i.v . ) produced dose-related increases in heart rate ( prevented by 20 micrograms/kg pindolol , i.v . ) , left ventricular dp/dt max and aortic flow .
C0018787
heart
C0225897
left ventricular