intravenous encainide terminated a primary atrial tachycardia in 4 of 4 patients , 3 of whom had an incessant arrhythmia , and oral encainide was effective or partially effective in 6 of 10 patients treated for an average of 2.9 years with a mean dosage of 156 mg/day .
C0003811
arrhythmia
C0085251
encainide