Umsebenzi wentliziyo ukupompa igazi elihlamba elo nxalenye yomzimba. Igazi lithwala i-oksijini kunye nezondlo ezibalulekileyo kwizicubu kwaye zisusa iimveliso zerkunkuma. Ukuba isenzo sokupompa intliziyo siphazamiseka, izitho zomzimba ziqala ukusilela ngokukhawuleza. Ngoko ubomi ngokwabo kuxhomekeke ekusebenzeni kakuhle, okuqhubekayo kwentliziyo.
Inhliziyo iyilungu le-muscular ngokulingana nobukhulu bakho. Njengoko iintliziyo zentliziyo zenza izivumelwano okanye zidibanisa, iqhubela igazi kwi-system ye-vascular system. Amagumbi eenhliziyo kunye neeplavines zilungiselelwe ukuhambisa ukuhamba kwegazi njengoko intliziyo ibetha.
Amagumbi eNhliziyo kunye neeValves
Intliziyo inamagumbi amane. Iipriricle ezimbini (ezisekunene nakwesobunxele) ziindawo zamathambo ezihambisa igazi ngaphakathi entliziyweni. I-ventricle efanelekileyo igxotha igazi kumapapu, kwaye i-ventricle yekhohlo iphupha igazi kuzo zonke izitho.
I-atria ezimbini (ngakwesobunxele nangesobunxele) zibamba igazi elibuyela entliziyweni, kwaye ngexesha elifanelekileyo lilingenalutho kwii-ventricle ezilungileyo kunye nekhohlo.
Iintsimbi ezine zentliziyo (tricuspid, pulmonary, mitral kunye ne-aortic) zigcina igazi lihamba ngendlela elungileyo ngentliziyo.
Ku luncedo ukujonga ngentsingiselo intliziyo esebenzayo njengamapompo ahlukeneyo amabini, esebenza kwichungechunge; ipompo yenhliziyo, kunye nepompo yenhliziyo ekhohlo.
I-Heart Heart Pump
Ipompo yenhliziyo efanelekileyo ine-atrium elungileyo, i-valve i-tricuspid, i-ventricle efanelekileyo, i-valve ye-pulmonic, kunye ne-pulmary artery. Umsebenzi wakhe ukuqinisekisa ukuba igazi "elisetyenziswayo" lilayishwa kwakhona nge-oxygen. I-oksijeni-ilahlekile igazi ebuyela entliziyweni evela kwiimfumba zomzimba ingena kwindawo efanelekileyo. Xa isivumelwano se-atria, i-valve ye-tricuspid ivule kwaye ivumela igazi ukuba ligxothwe kwi-atrium elungileyo kwi-ventricle efanelekileyo.
Emva koko, xa i-ventricle isivumelwano, i-valve i-tricuspid ivala (ukukhusela igazi ukuhlamba ngasemva ukuya kwi-atrium elungileyo), kwaye i-valve ye-pulmonic ivuleka-ke igazi likhishwa kwi-ventricle efanelekileyo kwaye kuphuma kwimitha yamapulmonary kunye nemiphunga, apho lizaliswa nge-oxygen.
Ipompo Yentliziyo Ekhohlo
Ipompo yenhliziyo ekhohlo iqukethe i-atrium yekhohlo, i-mitral valve, i-ventricle ekhohlo, i-aortic valve kunye ne-aorta. Umsebenzi wayo ukupompa igazi elityebileyo nge-oksijini ukuya kumathishini omzimba. Igazi elibuyela entliziyweni ukusuka emiphakeni lingena kwi-atrium ekhohlo. Xa isivumelwano se-atria, i-mitral valve ivula kwaye ivumela igazi ukuba lingene kwi-ventricle ekhohlo. Xa i-ventricle yesivumelwano ihamba ngexeshana kamva, i-mitral valve ivaliwe kwaye i-valor i-aortic ivula. Igazi lixhunywe ngaphandle kwe-ventricle ekhohlo, ngapha kwe-valve ye-aortic, kwaye iya emzimbeni.
- Funda nge mitral stenosis.
- Funda ngokuphindaphindiweyo.
- Funda malunga ne-aortic stenosis.
- Funda ngokuphindaphindiweyo kwe-aortic.
ICycleac Cycle
Unokuva malunga nombono obizwa ngokuba ngumjikelezo wentliziyo. Ngokulula, "umjikelezo wentliziyo" yindlela odokotela abahlula ngayo umsebenzi weentliziyo zibe zigaba ezimbini - isigaba se-diastolic nesigaba se-systolic.
Kwi sigaba se-diastolic, ii-ventricles ziphumle kwaye zizaliswa ngegazi kwi-atria ezimbini. Kwisigaba se systolic, iipricricles ezimbini zivumelwano.
Eli sigama linceda ngeendlela ezininzi. Ngokomzekelo, xa silinganisa uxinzelelo lwegazi, silinganisa uxinzelelo kwimibhobho ngexesha zombini izigaba zomjikelezo wenhliziyo - i-systolic ne-diastolic. Ngoko, uxinzelelo lwegazi luchazwa ngamanani amabini, afana ne-120/80. Nantsi, uxinzelelo lwegazi lwe-systolic (uxinzelelo lwe-arterial at the moment the windricles are beating) ngu-120 mmHg, kwaye uxinzelelo lwe-diastolic (uxinzelelo ngexesha lokuphumla kwe-ventricular) ngu-80 mmHg.
Kwakhona, xa izazi ze-cardiologists zithetha ngokungafezeki kwenhliziyo, zidla ngokucacileyo ukuba i-cardiac disysction ichaphazela kakhulu inxalenye ye-systolic ye- cardiomyopathy , okanye isahlulo se-diastolic (njengobunzima be- diastolic ). Uphuhliso olufanelekileyo ludinga ukwenza lo mahluko.
Funda malunga ne-anatomy yeempawu ze-coronary.
Imithombo:
Otto CM. Umbhalo we-Clinical Echocardiography, umqulu we-4, uSaunders Elsevier, 2009.