the drug suppresses recurrences of cardiac tachyarrhythmias in a high percent of patients , in the range of 80 % or more for most supraventricular tachycardias and in about 66 % of patients with ventricular tachyarrhythmias , sometimes requiring addition of a second antiarrhythmic agent .
C0080203
tachyarrhythmias
C0039240
supraventricular tachycardias