type 1a antiarrhythmic drugs achieved long-term suppression of intraatrial reentrant tachycardia in only 6 patients , whereas amiodarone ( 326 +/- 145 mg/day ) was successful in 11 patients during a 32 +/- 20 month follow-up period .
C0003195
antiarrhythmic drugs
C0002598
amiodarone