I-heart rate ye-Fetal yinkomba ebalulekile hhayi kuphela ngesistimu yenhliziyo, kodwa yendoda encane ekhulayo. Ukuntuleka kwe-oksijeni kanye nezakhi zomzimba kuqala, kubonakala ekushintsheni kwenhliziyo yesisu. Izinga lentliziyo ye-fetal ngesikhathi sokubeletha kwamasonto angu-12 kungathathwa kuphela ngokuhlolwa kwe-ultrasound, futhi ngosuku olulandelayo (emva kwamasonto angu-24) kule njongo lisetshenziswa isitifiketi se-obstetric yabesifazane abakhulelwe kanye ne-cardiotocography.
Izici zokuthuthukiswa nokusebenza kwenhliziyo yombungu
Uhlelo lwe-cardiovascular lwakhiwe embryo ngokushesha njengoba isimiso sezinzwa, ngaphambi kokwakhiwa kwamanye amalungu kanye nezinhlelo. Ngakho-ke, ukuhlukaniswa kwe-zygote kuholela ekubunjweni kwamaseli amaningi, ahlukaniswe abe izingxenye ezimbili, aphikisiwe abe yi-tube. Kusuka engxenyeni yangaphakathi yokufakelwa, okwakuthiwa yi-primary heart loop. Ngaphezu kwalokho, landa ngokushesha futhi lilale ngakwesokudla, okuyinto isibambiso sokuma kwesokunxele senhliziyo kulo mntwana lapho ezalwa.
Emasontweni ama-4 okukhulelwa engxenyeni engezansi ye-loop eyakhiwe ibonakala ukukhishwa kokuqala - lokhu kungukuqala kwezingqinamba zenhliziyo encane. Intuthuko esebenzayo yenhliziyo nezitsha ezinkulu zivela emavikini angu-5 ukuya kwangu-8 okukhulelwa. Ukulungisa uhlelo lwe-cardiovascular kubaluleke kakhulu ekuthuthukiseni i-herto- ne-organogenesis.
Isilinganiso senhliziyo ye-fetal emavikini angu-12 wokukhulelwa kuvame ukuba ngu-130-160 ukushaya ngomzuzu futhi kungashintshi kuze kube sekuzalweni. I-Bradycardia engaphansi kuka-110 beats ngomzuzu noma i-tachycardia ngaphezu kwe-170 beats ngomzuzu iyisiginali sokuthi umntwana uthola ukungabi ne-oksijeni noma imiphumela yokutheleleka kwe-intrauterine .
Ngakho-ke, lapho sicabange izici zokuthuthukiswa kwesimiso senhliziyo yesisu somntwana, singaphetha ngokuthi impumelelo yokwakheka kwamanye amalungu nezinhlelo ngokuqondile kuxhomeke kwikhwalithi yezinhliziyo ezakhelwe nemithambo yegazi.