encainide has been administered both intravenously ( 0.5 to 1.7 mg/kg ) and orally ( 100 to 300 mg/day ) to patients with lethal ventricular arrhythmias -- ventricular tachycardia ( vt ) and ventricular fibrillation -- and evaluated by electrophysiologic testing .
C0085612
ventricular arrhythmias
C0042514
ventricular tachycardia