metoprolol tartrate ( 1.0 mg/kg i.v . ) , atenolol ( 0.3 mg/kg i.v . ) , propranolol hydrochloride ( 0.3 mg/kg i.v . ) , pindolol ( 0.03 mg/kg i.v . ) , or saline control ( 0.9 % nacl solution ; vehicle ) was given , alone and in combination with lidocaine ( l ) , to groups of six pentobarbital ( 32.5 mg/kg i.v . ) anesthetized mongrel dogs after control vft and control isoproterenol-induced ( iso ) positive chronotropic effects had been determined .
C0700548
metoprolol tartrate
C0042510
vft