ARTICLES|?VOLUME16,ISSUE10,?P781-788,?OCTOBER01,2017Tenecteplase versusalteplaseformanagementofacuteischaemicstrokeSummaryB ackgroundTenecteplaseisanewerthrombolyticagentwithsomeph armacologicaladvantagesoveralteplase.Previousphase2trials oftenecteplaseinacuteischaemicstrokehaveshownpromisingre sults.Weaimedtoinvestigatethesafetyandefficacyoftenecte plaseversusalteplaseinpatientswithacutestrokewhowereeli gibleforintravenousthrombolysis.MethodsThisphase3,randomise d,open-label,blindedendpoint,superioritytrialwasdonein13 strokeunitsinNorway.Weenrolledadultswithsuspectedacute ischaemicstrokewhowereeligibleforthrombolysisandadmitted within4·5hofsymptomonsetorwithin4·5hofawakeningwiths ymptoms,orwhowereeligibleforbridgingtherapybeforethrombe ctomy.Patientswererandomlyassigned(1:1)toreceiveintraveno ustenecteplase0·4mg/kg(toamaximumof40mg)oralteplase0· 9mg/kg(toamaximumof90mg),viaablockrandomisationschedu lestratifiedbycentreofinclusion.Patientswerenotinformed oftreatmentallocation;treatingphysicianswereawareoftreatm entallocationbutthoseassessingtheprimaryandsecondaryendp ointswerenot.Theprimaryoutcomewasexcellentfunctionaloutc omedefinedasmodifiedRankinScale(mRS)score0–1at3months. Theprimaryanalysiswasanunadjustedandnon-stratifiedintent ion-to-treatanalysiswithlastobservationcarriedforwardfori mputationofmissingdata.Thisstudyisregisteredwith?Clinical Trials.gov,number?NCT01949948.FindingsBetweenSept1,2012,and Sept30,2016,1107patientsmettheinclusioncriteriaandseven patientswereexcludedbecauseinformedconsentwaswithdrawnor eligibilityforthrombolytictreatmentwasreconsidered.1100pa tientswererandomlyassignedtothetenecteplase(n=549)oralte plase(n=551)groups.Themedianageofparticipantswas77years (IQR64–79)andthemedianNationalInstitutesofHealthStroke Scalescoreatbaselinewas4points(IQR2–8).Afinaldiagnosis otherthanischaemicstrokeortransientischaemicattackwasfo undin99(18%)patientsinthetenecteplasegroupand91(17%)p atientsinthealteplasegroup.Theprimaryoutcomewasachieved by354(64%)patientsinthetenecteplasegroupand345(63%)pat ientsinthealteplasegroup(oddsratio1·08,95%CI0·84–1·38; p=0·52).By3months,29(5%)patientshaddiedinthetenectepla segroupcomparedwith26(5%)inthealteplasegroup.Thefreque ncyofseriousadverseeventswassimilarbetweengroups(145[26 %]inthetenecteplasegroup?vs?141[26%]inthealteplasegroup; p=0·74).InterpretationTenecteplasewasnotsuperiortoalteplase andshowedasimilarsafetyprofile.Mostpatientsenrolledint hisstudyhadmildstroke.Furthertrialsareneededtoestablish thesafetyandefficacyinpatientswithseverestrokeandwheth ertenecteplaseisnon-inferiortoalteplase.FundingResearchCoun cilofNorway.ReferencesLeesKR?.BluhmkiE?.vonKummerR?.etal. 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