简介:Permanentpacemakerimplantisacommonlyperformedcardiacprocedurefortreatmentofbradycardiaorconductionsystemabnormality.Withconventionalrightventricular(RV)pacingaleadisimplantedattheRVapexorontheRVseptum.However,RVapicalorRVseptalpacingcausesiatrogenicleftbundle-branchblockandventriculardyssynchronyandcanleadtoadversecardiacremodeling,apacing-mediatedcardiomyopathy,andcongestiveheartfailure.Alternatively,permanentHis-bundlepacingusestheintrinsicrapidly-conductingHis-Purkinjesystemtoactivatetheventricle,therebymaintaining(orsometimesevenrestoring)ventricularsynchrony.ManypatientsmayderivebenefitfrompermanentHis-bundlepacing.