| 摘要： | AnactiveimplantablemedicaldeviceoftheARI/DDDtype,notablyacardiacpacemaker,includingautomaticmodeadjustmentatimplantation.Thedevicedetectsspontaneousatrialandventricularevents,andisabletopacetheatriumandventricle.ThedevicecanoperateinanAAImodewithventricularsensing,aDDDmode,andincludesautomaticmodecommutation,abletoschedule,asafunctionofpredeterminedcriteria,commutationfromAAItoDDDmode,andreverselyfromDDDtoAAI.Thedeviceautomaticallydetectsanimplantationandhasitsinitialmodeofoperationadjustedupondetectionoftheimplantation(10).Thedevicetemporarilyoperates(14)inanAAImodewithactivationofthemeansformodecommutation,thenanalyzes(20)theatrio-ventricularconductionsoastodetectwhetherapotentialconductiondisorderexists.Incaseofapotentialconductiondisorderexisting(presence)(24),thedeviceisthensettoaDDDmodeandtheautomaticmodecommutationisinhibited.Otherwise(26),thedeviceissettoanAAImode,andtheautomaticmodecommutationremainsactivated |