Chii chinonzi electrocardiogram?

Iyo myocardial cell membrane ndeye semi-permeable membrane.Paunenge uchizorora, imwe nhamba yemakesheni akachajiwa anorongwa kunze kwe membrane.Nhamba imwechete yeanion inopomerwa zvakashata inorongwa mu membrane, uye iyo yekuwedzera-membrane inogona yakakwirira kudarika membrane, iyo inonzi polarization state.Pakuzorora, ma cardiomyocytes muchikamu chimwe nechimwe chemoyo ari mu polarized state, uye hapana mutsauko unogona kuitika.Iyo inogona curve inoteverwa neazvino rekodha yakatwasuka, inova iyo equipotential mutsara wepamusoro electrocardiogram.Apo iyo cardiomyocytes inokurudzirwa nehumwe simba, kupera kwesero membrane kunoshanduka uye nhamba huru ye cations inopinda mukati me membrane munguva pfupi, kuitira kuti zvingave mukati me membrane inoshanduka kubva kune yakaipa kusvika kune yakaipa.Iyi nzira inonzi depolarization.Nekuda kwemoyo wese, iyo inogona shanduko ye cardiomyocytes kubva ku endocardial kuenda ku epicardial sequence depolarization, iyo inogona kurongeka inoteverwa neazvino rekodha inonzi depolarization wave, kureva, P wave uye ventricle yeatrium pamusoro pepamusoro electrocardiogram QRS wave.Mushure mokunge sero rabviswa zvachose, membrane yesero inobudisa nhamba yakawanda ye cations, zvichiita kuti kukwanisa mu membrane kuchinje kubva kune chakanaka kusvika kune chakaipa uye kudzokera kune chepakutanga polarization state.Iyi nzira inoitwa ne epicardium kune endocardium, iyo inonzi repolarization.Saizvozvo, iyo inogona shanduko panguva yerepolarization ye cardiomyocytes inotsanangurwa neino rekodha sepolar wave.Sezvo iyo repolarization process iri kunonoka, iyo repolarization wave yakaderera pane depolarization wave.Iyo electrocardiogram yeatrium yakaderera muatrial wave uye inovigwa mumhepo.Iyo polar wave ye ventricle inoratidzika seT wave pamusoro pe electrocardiogram.Mushure mokunge cardiomyocytes yose yakadzorerwa, iyo polarization state yakadzorerwa zvakare.Pakanga pasina mutsauko unokwanisa pakati pemasero emyocardial muchikamu chimwe nechimwe, uye iyo yepamusoro electrocardiogram yakanyorwa kune equipotential line.

Mwoyo chimiro chemativi matatu.Kuti uratidze kushanda kwemagetsi ezvikamu zvakasiyana-siyana zvemwoyo, electrodes inoiswa munzvimbo dzakasiyana-siyana dzomuviri kunyora uye kuratidza kushanda kwemagetsi emwoyo.Muchigadziro che electrocardiography, chete 4 nhengo dzinotungamirira electrodes uye V1 kusvika kuV66 thoracic lead electrodes inowanzoiswa, uye yakajairika 12-lead electrocardiogram inonyorwa.Imwe nzira yakasiyana inoumbwa pakati pema electrode maviri kana pakati pe electrode uye nechepakati inogona kupera uye inobatanidzwa kune zvakanaka uye zvisina kunaka matanda e electrocardiograph galvanometer kuburikidza newaya inotungamira kunyora kushanda kwemagetsi emwoyo.Bipolar lead inoumbwa pakati pemaelectrode maviri, mutobvu mumwe uchive danda rakanaka uye mutobvu mumwe uchive danda risina kunaka.Bipolar nhengo inotungamira inosanganisira I lead, II inotungamira uye III inotungamira;monopolar lead inoumbwa pakati pe electrode nepakati inogona kupera, apo electrode yekuona ndiyo danda rakanaka uye iyo yepakati inogona kupera ndiyo danda risina kunaka.Mhedziso yemagetsi yepakati ndiyo Musiyano unogona kunyorwa pa electrode yakaipa idiki, saka iyo inegetsi yemagetsi ndiyo inoreva huwandu hwezvinogoneka zvemitungamiri yemamwe makumbo maviri kunze kweiyo probe electrode.

Iyo electrocardiogram inorekodha curve yevoltage nekufamba kwenguva.Iyo electrocardiogram inonyorwa papepa rekubatanidza, uye pepa rekubatanidza rinoumbwa nemasero madiki ehupamhi 1 mm uye 1 mm kureba.Iyo abscissa inomiririra nguva uye iyo inomiririra inomiririra voltage.Kazhinji inorekodhwa pa 25mm/s bepa kumhanya, 1 diki grid = 1mm = 0.04 masekonzi.Iyo yakarongeka voltage ndeye 1 diki grid = 1 mm = 0.1 mv.Nzira dzekuyera dzeakisi ye electrocardiogram dzinonyanya kusanganisira nzira yekuona, nzira yemepu, uye nzira yekutarisa tafura.Mwoyo unoburitsa akawanda akasiyana galvanic vector vectors mukuita depolarization uye repolarization.Iro galvanic couples vectors mumativi akasiyana-siyana anosanganiswa kuva vector kuti iite yakabatanidzwa ECG vector yemwoyo wose.Iyo moyo vector itatu-dimensional vector ine pamberi, sagittal, uye yakachinjika ndege.Inowanzo shandiswa kukiriniki ndiyo kutungamira kwechikamu chevheta chinoratidzwa pane yepamberi ndege panguva ye ventricular depolarization.Batsira kuziva kana kushanda kwemagetsi emwoyo kuri kwenguva dzose.

 


Nguva yekutumira: Aug-24-2021