pretreatment of rats with an acute dose ( 3.75 mg/kg , i.v . ) of either mdi provided virtually complete protection against bradycardia , arrhythmias , and death induced by an acute intravenous dose of calcium ( 1 ml/kg of a 10 % cacl2 . 2h2o solution .
C0428977
bradycardia
C0003811
arrhythmias