bretylium pretreatment ( 20 mg/kg , i.v . ) administered 2 h prior to ouabain ( 2 micrograms/kg/min , i.v . until death ) increased the dose of ouabain to produce premature ventricular contraction , ventricular tachycardia , and death from 77.2 +/- 5.2 to 107.7 +/- 6.7 micrograms/kg ;
C0054040
pretreatment
C0042514
ventricular tachycardia