Lera la sele ea myocardial ke lera le nang le semi-permeable.Ha u phomotse, palo e itseng ea li-cations tse qosoang hantle li hlophisoa ka ntle ho lera.Palo e ts'oanang ea li-anion tse qosoang hampe li hlophisitsoe ka har'a lera, 'me bokhoni ba extra-membrane bo phahame ho feta lera, le bitsoang polarization state.Nakong ea phomolo, li-cardiomyocyte karolong e 'ngoe le e' ngoe ea pelo li boemong ba polarized, 'me ha ho na phapang e ka bang teng.Mokokotlo o ka bang teng o lateloang ke sehatisi sa hajoale o otlolohile, e leng mohala oa equipotential oa holim'a electrocardiogram.Ha li-cardiomyocyte li susumetsoa ke matla a itseng, ho khoneha ha lera la sele ho fetoha 'me palo e kholo ea li-cations e kenella ka har'a lera ka nako e khutšoanyane, e le hore bokhoni bo ka hare ho lera bo fetohe ho tloha bobe ho ea ho bo bobe.Mokhoa ona o bitsoa depolarization.Bakeng sa pelo eohle, phetoho e ka bang teng ea cardiomyocyte ho tloha ho endocardial ho ea ho epicardial sequence depolarization, lekhalo le ka bang teng le lateloang ke rekotara ea hona joale le bitsoa depolarization wave, ke hore, P wave le ventricle ea atrium holim'a electrocardiogram QRS wave.Ka mor'a hore sele e tlosoe ka ho feletseng, lesela la sele le ntša palo e kholo ea li-cations, e leng se etsang hore bokhoni bo ka har'a lesela bo fetohe ho tloha ho tse ntle ho ea ho tse mpe ebe bo khutlela sebakeng sa pele sa polarization.Ts'ebetso ena e etsoa ke epicardium ho ea ho endocardium, e bitsoang repolarization.Ka mokhoa o ts'oanang, phetoho e ka bang teng nakong ea repolarization ea cardiomyocyte e hlalosoa ke sehatisi sa hajoale e le leqhubu la polar.Kaha ts'ebetso ea repolarization e batla e lieha, leqhubu la repolarization le tlase ho feta leqhubu la depolarization.Electrocardiogram ea atrium e tlaase ka leqhubu la atrial 'me e patoa ka ventricle.Leqhubu la polar la ventricle le hlaha e le leqhubu la T holim'a electrocardiogram.Ka mor'a hore li-cardiomyocyte kaofela li khutlisetsoe hape, boemo ba polarization bo ile ba tsosolosoa hape.Ho ne ho se na phapang e ka bang teng pakeng tsa lisele tsa myocardial karolong e 'ngoe le e' ngoe, 'me electrocardiogram ea holim'a metsi e ngotsoe moleng oa equipotential.
Pelo ke sebopeho sa mahlakore a mararo.E le ho bonahatsa mosebetsi oa motlakase oa likarolo tse fapaneng tsa pelo, li-electrode li behoa likarolong tse sa tšoaneng tsa 'mele ho rekota le ho bonahatsa mosebetsi oa motlakase oa pelo.Ho electrocardiography e tloaelehileng, ke li-electrode tse etellang pele tsa maoto a 4 feela le V1 ho ea ho V66 ea li-electrode tsa thoracic tse atisang ho behoa, 'me ho tlalehoa electrocardiogram e tloaelehileng ea 12-lead.Moeta-pele o fapaneng o thehoa pakeng tsa li-electrode tse peli kapa pakeng tsa electrode le qetello ea bokhoni bo bohareng 'me e hokahane le lipalo tse ntle le tse mpe tsa electrocardiograph galvanometer ka terata e etellang pele ho tlaleha mosebetsi oa motlakase oa pelo.Ho thehoa ha li-electrode tse peli pakeng tsa li-electrode tse peli, loto e le 'ngoe e le palo e ntle le palo e mpe.Li-Bipolar Limb lead li kenyelletsa I lead, II lead le III lead;moeta-pele oa monopolar o thehoa pakeng tsa electrode le qetello ea bokhoni bo bohareng, moo electrode ea ho lemoha e leng palo e ntle 'me qetello ea bokhoni bo bohareng ke palo e mpe.Qetellong ea motlakase e bohareng ke Phapang e ka bang teng e tlalehiloeng ho eleketrode e mpe e nyane haholo, kahoo eleketrode e mpe ke moelelo oa kakaretso ea bokhoni ba likarolo tse ling tse peli ntle le electrode ea probe.
Electrocardiogram e rekota lebelo la motlakase ka nako.Electrocardiogram e ngotsoe pampiring ea ho hokahanya, 'me pampiri ea ho hokahanya e entsoe ka lisele tse nyenyane tsa 1 mm bophara le 1 mm ka bolelele.Abscissa e emela nako mme ordinate e emetse voltage.Hangata e ngotsoe ka lebelo la pampiri ea 25mm / s, 1 grid e nyenyane = 1mm = 0.04 metsotsoana.Matla a kopantsoeng ke 1 grid e nyenyane = 1 mm = 0.1 mv.Mekhoa ea ho metha ea axis ea electrocardiogram haholo-holo e kenyelletsa mokhoa oa pono, mokhoa oa ho etsa 'mapa, le mokhoa oa ho sheba tafole.Pelo e hlahisa li-vector tse ngata tse fapaneng nakong ea depolarization le repolarization.Li-vector tse peli tsa galvanic ka litsela tse fapaneng li kopantsoe ho ba vector ho etsa mochine o kopantsoeng oa ECG oa pelo eohle.Vector ea pelo ke vector e mahlakore a mararo e nang le lifofane tse ka pele, sagittal le tse rapameng.Hangata ho sebelisoa tleliniking ke tataiso ea vector e sa fellang e hlahisoang sefofaneng se ka pele nakong ea depolarization ea ventricular.Thusa ho fumana hore na ts'ebetso ea motlakase ea pelo e tloaelehile.
Nako ea poso: Aug-24-2021