Electrocardiography

Electrocardiography yog cov txheej txheem ntawm kev tsim ib qho electrocardiogram (ECG lossis EKG), ib qho kev kaw lus - ib daim duab ntawm qhov hluav taws xob piv rau lub sijhawm - ntawm cov hluav taws xob ua haujlwm ntawm lub plawv siv electrodes tso rau ntawm daim tawv nqaij.Cov electrodes no tshawb pom cov kev hloov hluav taws xob me me uas yog qhov tshwm sim ntawm cov leeg nqaij depolarization ua raws li repolarization thaum lub sij hawm txhua lub voj voog (lub plawv dhia).Kev hloov pauv ntawm tus qauv ECG ib txwm tshwm sim hauv ntau lub plawv tsis zoo, suav nrog kev cuam tshuam ntawm lub plawv dhia (xws li atrial fibrillation thiab ventricular tachycardia), cov hlab ntsha tsis txaus (xws li myocardial ischemia thiab myocardial infarction), thiab electrolyte cuam tshuam (xws li hypokalemia thiab hyperkalemia. ).

Nyob rau hauv ib tug pa 12-lead ECG, kaum electrodes tau muab tso rau ntawm tus neeg mob cov ceg thiab nyob rau ntawm lub hauv siab.Tag nrho qhov loj ntawm lub plawv lub peev xwm hluav taws xob yog ntsuas los ntawm kaum ob lub kaum sab xis sib txawv ("cov coj") thiab raug kaw rau lub sijhawm (feem ntau yog kaum vib nas this).Ua li no, tag nrho qhov loj thiab kev taw qhia ntawm lub plawv hluav taws xob depolarization raug ntes txhua lub sijhawm thoob plaws hauv lub voj voog.

Muaj peb yam tseem ceeb rau ECG: P yoj, uas sawv cev rau depolarization ntawm atria;QRS complex, uas sawv cev rau depolarization ntawm lub ventricles;thiab T yoj, uas sawv cev rau repolarization ntawm lub ventricles.

Thaum lub sij hawm txhua lub plawv dhia, lub plawv noj qab nyob zoo muaj ib qho kev loj hlob ntawm depolarization uas pib nrog pacemaker hlwb nyob rau hauv lub sinoatrial node, kis thoob plaws hauv lub atrium, hla lub atrioventricular node mus rau hauv lub nras ntawm nws thiab mus rau hauv lub Purkinje fibers, kis mus rau hauv lub atrium. sab laug thoob plaws hauv lub ventricles.Qhov kev txiav txim siab ntawm depolarization no ua rau muaj tus yam ntxwv ECG taug qab.Rau tus kws kho mob uas tau kawm, ECG xa cov ntaub ntawv ntau txog cov qauv ntawm lub plawv thiab kev ua haujlwm ntawm nws cov hluav taws xob conduction system.Ntawm lwm yam, ib qho ECG tuaj yeem siv los ntsuas tus nqi thiab kev sib dhos ntawm lub plawv dhia, qhov loj thiab qhov chaw ntawm lub plawv chamber, muaj kev puas tsuaj rau lub plawv cov leeg hlwb lossis cov kab ke ua haujlwm, cov teebmeem ntawm cov tshuaj hauv lub plawv, thiab kev ua haujlwm. ntawm implanted pacemakers.

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