基于低频电场方式实现心腔内三维定位导航与心内膜重构的基础的研究

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1、基于低频电场方式实现心腔内三维定位导航及,On膜重构的基础研究英文摘要Thefundamentalinvestigationofthethree—dimensionalpositioningandnavigationandthereconstitutionofendocardium’Smodelwithlow—frequencycurrentfieldAbsractobj睇6"：Toapproachthefeasibifityofthethree-dimensionalpositioningandnavigationwithregul盯catheterelectrodesini

2、ntracavitarywithalow-frequencyelectricalfield．Methods：Loadingaspatialorthononnallowfrequencyalternatingcurrent毹ldontothegul'faccofanexperimentalanimalwimthreestandardskinelectrodestoereatlow-frequency．transthoracicorthonormalelectricalfieldstocoverthea嘲oftheheart．Thenregularcatheterelectzode

3、sareusedassensorsforalow-frequencytransthoracicelectricalfield．Weinvestigatedlocalizationaccuracywithintherightatrium．Thedamswhichwererecordedviastandardcatheterelectrodesc锄beusedtodeterminetheelectrodespositionOnthePConline．Wegot7邱icalpointsintherightatriumandinvestigatedlocalizationaccurac

4、ybycomparingmeasuredandtrueelectrodepositionofadecapolarcatheterwithXrays．Atthesametime,weinvestigatedthedistancesofthenecrosispointswithRadioFrequencyCatheterAblation(RFCA)．AtlastWCreconstitutedtheendocardium’Smodelbyuseofpoint-pointtype．Results：1klow-frequencyelectricalfIcldisofsafetyforth

5、eanimalsandElectrogramrecordingswereunaffectedbytheappliedelectricalfield．LocalizationdatafTom7catheterpositions，widelydistributedwithintherightatrium,wereanalyzed．10calizationsof7catheterpositionswerereproduciblewithin1．7士0．7mminXdirection，1．6-1-0．7mminYdirection，1．3土-0．5mminZdirection．The5

6、necrosispointswithRFCAmixedeachother．11帕diametersofthenecrosisfocusesWere7衄．Conclusions：(1)Themethodofalow-flequencytransthoracicorthonormalelectricalⅡ基于低频电场方式实现心腔内三维定位导航及心内膜重构的基础研究英文摘要field,whichisappliedviastandardskinelectrodesisfeasible．(2)Theexternalelectricalfieldisofsafetyfortheexperi

7、men￡aIanimals．(3)Eleetrogramwcordingswereunaffectedbytheappliedelectricalfield．thetechniquec锄beappliedtoregularcathetersandcomplexcatheterdesignssuch鹊multielectrodecatheters，irrigatedelectrodecatheters。andbasketcatheters．(4)Thisnewtechniqueenablesa