Electrocardiography

Electrocardiography ke mokhoa oa ho hlahisa electrocardiogram (ECG kapa EKG), rekoto - kerafo ea motlakase khahlanong le nako - ea ts'ebetso ea motlakase ea pelo e sebelisang li-electrode tse behiloeng letlalong.Li-electrode tsena li lemoha liphetoho tse nyenyane tsa motlakase tse bakoang ke ho senyeha ha mesifa ea pelo e lateloa ke ho repolarization nakong ea potoloho e 'ngoe le e' ngoe ea pelo (ho otla ha pelo).Liphetoho tsa mokhoa o tloaelehileng oa ECG li etsahala ka mekhoa e mengata e sa tloaelehang ea pelo, ho kenyelletsa le ho ferekana ha morethetho oa pelo (joalo ka atrial fibrillation le ventricular tachycardia), phallo ea mali e sa lekaneng ea methapo ea mali (e kang myocardial ischemia le myocardial infarction), le tšitiso ea electrolyte hypokalemia (hypokalemia). ).

Ka ECG e tloaelehileng ea 12-lead, li-electrode tse leshome li behoa maotong a mokuli le holim'a sefuba.Kakaretso ea boholo ba matla a motlakase a pelo e lekanngoa ho tloha ho li-angles tse leshome le metso e 'meli tse fapaneng (“loto”) ’me li tlalehoa ka nako e itseng (hangata metsotsoana e leshome).Ka tsela ena, boholo bo akaretsang le tataiso ea depolarization ea motlakase ea pelo e nkuoa motsotso o mong le o mong ho pholletsa le potoloho ea pelo.

Ho na le likarolo tse tharo tse ka sehloohong tsa ECG: leqhubu la P, le emelang depolarization ea atria;QRS e rarahaneng, e emelang depolarization ea li-ventricle;le leqhubu la T, le emelang repolarization ea li-ventricle.

Nakong ea ho otla ha pelo e 'ngoe le e' ngoe, pelo e phetseng hantle e na le tsoelo-pele e hlophisehileng ea depolarization e qalang ka lisele tsa pacemaker node ea sinoatrial, e hasana ho pholletsa le atrium, e feta ka node ea atrioventricular ho ea fihla mokotleng oa Hae le ho kena ka har'a likhoele tsa Purkinje, li hasana fatše le ho ea fihla. e setseng ho pholletsa le li-ventricle.Mokhoa ona o hlophisitsoeng oa depolarization o etsa hore ho be le mohlala oa ECG.Ho ngaka e koetlisitsoeng, ECG e fetisa boitsebiso bo bongata mabapi le sebopeho sa pelo le mosebetsi oa tsamaiso ea eona ea motlakase.Har'a lintho tse ling, ECG e ka sebelisoa ho lekanya lebelo le morethetho oa ho otla ha pelo, boholo le boemo ba likamore tsa pelo, boteng ba tšenyo leha e le efe liseleng tsa mesifa ea pelo kapa tsamaiso ea ho tsamaisa pelo, liphello tsa lithethefatsi tsa pelo, le mosebetsi. ea li-pacemaker tse kentsoeng.

https://en.wikipedia.org/wiki/Electrocardiography