Electrocardiography

ʻO ka Electrocardiography ka hana o ka hana ʻana i kahi electrocardiogram (ECG a i ʻole EKG), kahi hoʻopaʻa - ka pakuhi o ka volta me ka manawa - o ka hana uila o ka puʻuwai me ka hoʻohana ʻana i nā electrodes i kau ʻia ma ka ʻili.ʻIke kēia mau electrodes i nā hoʻololi uila liʻiliʻi ma muli o ka depolarization o ka ʻiʻo puʻuwai a ukali ʻia e ka repolarization i kēlā me kēia pōʻai puʻuwai (ka puʻuwai puʻuwai).Hiki ke hoʻololi i ke ʻano ECG maʻamau i loko o nā ʻano like ʻole o ka naʻau, e like me nā haʻalulu puʻuwai (e like me ka fibrillation atrial a me ka tachycardia ventricular), lawa ʻole ke kahe koko coronary (e like me ka myocardial ischemia a me ka myocardial infarction), a me nā pilikia electrolyte (e like me ka hypokalemia a me ka hyperkalemia. ).

Ma kahi ECG 12-lead maʻamau, kau ʻia nā electrodes he ʻumi ma nā lālā o ka mea maʻi a ma ka ʻili o ka umauma.A laila e ana ʻia ka nui holoʻokoʻa o ka mana uila o ka puʻuwai mai ʻumikumamālua mau kihi ʻokoʻa ("alakaʻi") a hoʻopaʻa ʻia i kahi manawa (maʻamau he ʻumi kekona).Ma kēia ʻano, hopu ʻia ka nui a me ke kuhikuhi o ka depolarization uila o ka puʻuwai i kēlā me kēia manawa i loko o ka pōʻai cardiac.

ʻEkolu mau mea nui i ka ECG: ka hawewe P, e hōʻike ana i ka depolarization o ka atria;ka QRS complex, e hōʻike ana i ka depolarization o nā ventricles;a me ka hawewe T, e hoike ana i ka repolarization o na ventricles.

I loko o kēlā me kēia puʻuwai, ʻo ka puʻuwai olakino ka holomua o ka depolarization e hoʻomaka me nā cell pacemaker i loko o ka node sinoatrial, hohola a puni ka atrium, hele i loko o ka puʻupuʻu atrioventricular i lalo i loko o ka pūʻolo o kāna a i loko o nā puʻupuʻu Purkinje, e pālahalaha ana i lalo a i ka waiho ʻia i loko o ka ventricle.Hāʻawi kēia ʻano hoʻonohonoho o ka depolarization i ka hiʻohiʻona ECG.I ke kauka i aʻo ʻia, hāʻawi kahi ECG i ka nui o ka ʻike e pili ana i ke ʻano o ka puʻuwai a me ka hana o kāna ʻōnaehana hoʻokele uila.Ma waena o nā mea ʻē aʻe, hiki ke hoʻohana ʻia kahi ECG e ana i ka helu a me ka puʻuwai o ka puʻuwai, ka nui a me ke kūlana o nā keʻena puʻuwai, ka loaʻa ʻana o kekahi pōʻino i nā ʻiʻo ʻiʻo o ka puʻuwai a i ʻole ka ʻōnaehana conduction, nā hopena o nā lāʻau lapaʻau naʻau, a me ka hana. o na mea pacemaker i hookomoia.

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