4、sstillDDDmode.Noatrialfibrillationandflutterwasfoundwhenbeingfollowedup2~6months.It’sconcludedthatbiatrialtrichamberpacemakercansuccessfullypreventatrialfibrillationandflutterinSSSandabnormalatrioventricularconductionpatientswithintraatrialconductionblock. Ke