I-Electrocardiography inqubo yokukhiqiza i-electrocardiogram (ECG noma i-EKG), okurekhodiwe - igrafu yamandla kagesi uma kuqhathaniswa nesikhathi - somsebenzi kagesi wenhliziyo kusetshenziswa ama-electrode abekwe esikhumbeni.Lawa ma-electrode athola izinguquko ezincane zikagesi eziwumphumela wokuchithwa kwemisipha yenhliziyo okulandelwa ukuphindaphinda phakathi nomjikelezo wenhliziyo ngamunye (ukushaya kwenhliziyo).Izinguquko kuphethini ye-ECG evamile zenzeka ezinkingeni eziningi zenhliziyo, okuhlanganisa ukuphazamiseka kwesigqi senhliziyo (njenge-atrial fibrillation kanye ne-ventricular tachycardia), ukugeleza kwegazi kwe-coronary enganele (njenge-myocardial ischemia kanye ne-myocardial infarction), kanye nokuphazamiseka kwe-electrolyte hypokalemia ).
Ku-ECG evamile engu-12, ama-electrode ayishumi afakwa ezithweni zesiguli nangaphezulu kwesifuba.Ubukhulu bubonke bamandla kagesi wenhliziyo bube bulinganiswa ngama-engeli ayishumi nambili ahlukene (“umthofu”) futhi burekhodwa phakathi nenkathi yesikhathi (imvamisa imizuzwana eyishumi).Ngale ndlela, ubukhulu kanye nesiqondiso se-depolarization kagesi wenhliziyo kuthathwa ngesikhathi ngasinye kuwo wonke umjikelezo wenhliziyo.
Kunezingxenye ezintathu eziyinhloko ze-ECG: igagasi le-P, elimele ukuchithwa kwe-atria;i-QRS complex, emele ukuchithwa kwama-ventricles;kanye negagasi le-T, elimele ukuphindaphindeka kwama-ventricles.
Phakathi nokushaya kwenhliziyo ngakunye, inhliziyo enempilo inokuqhubeka okuhlelekile kokuwohloka kwenhliziyo okuqala ngamangqamuzana enhliziyo enhliziyo ku-node ye-sinoatrial, isakazeke kuyo yonke i-atrium, idlule ku-atrioventricular node yehle iye enyameni Yakhe futhi ingene emicu ye-Purkinje, isakazeke phansi futhi iye phezulu. kwesokunxele kuwo wonke ama-ventricles.Le phethini ehlelekile ye-depolarization idala ukulandelwa kwesici se-ECG.Kumtholampilo oqeqeshiwe, i-ECG idlulisela inani elikhulu lolwazi mayelana nesakhiwo senhliziyo kanye nomsebenzi wesistimu yayo yokuqhuba ugesi.Phakathi kokunye, i-ECG ingase isetshenziselwe ukukala izinga nesigqi sokushaya kwenhliziyo, ubukhulu nokuma kwamagumbi enhliziyo, ukuba khona kwanoma imuphi umonakalo emangqamuzaneni emisipha yenhliziyo noma ohlelweni lokushaya kwenhliziyo, imiphumela yezidakamizwa zenhliziyo, kanye nomsebenzi. ama-pacemaker afakiwe.
https://en.wikipedia.org/wiki/Electrocardiography
Isikhathi sokuthumela: May-22-2019