Video: Dab tsi tswj hwm cov hluav taws xob hauv plawv?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
SA node (hu ua pacemaker ntawm plawv ) xa tawm ib qho hluav taws xob impulse . Saum plawv chav (atria) daim ntawv cog lus. Qhov qis plawv chav (ventricles) daim ntawv cog lus lossis twj tso kua mis. SA node xa lwm lub teeb liab mus rau atria rau kev cog lus, uas pib lub voj voog dua.
Ntawm no, dab tsi ua rau hluav taws xob cuam tshuam hauv plawv?
Ib hluav taws xob kev txhawb zog yog tsim los ntawm cov leeg ntshav (tseem hu ua sinoatrial node, lossis SA node). Qhov no yog qhov me me ntawm cov nqaij tshwj xeeb uas nyob hauv chav sab xis (atria) ntawm plawv . Cov sinus node tsim ib qho hluav taws xob kev txhawb nqa tsis tu ncua, 60 txog 100 zaug hauv ib feeb hauv qhov xwm txheej ib txwm muaj.
Ib yam nkaus, lub plawv puas muaj hluav taws xob? Cov hluav taws xob system ntawm plawv yog lub hwj chim uas ua rau qhov no ua tau. Koj lub plawv dhia yog ua los ntawm hluav taws xob impulses uas taug kev hauv txoj hauv kev tshwj xeeb los ntawm plawv . Cov kev xav pib hauv pob me me ntawm cov hlwb tshwj xeeb hu ua SA node (sinoatrial node), nyob rau sab xis ntawm lub atrium.
Ib yam li ib tus yuav nug, dab tsi tswj lub plawv dhia?
Koj lub plawv dhia ib txwm tswj los ntawm lub ntuj pacemaker (sinus node) nyob hauv sab xis atrium. Cov kev xav no ua rau cov leeg atria sib cog lus thiab tso ntshav rau hauv lub ntsws. Cov hluav taws xob xa hluav taws xob tuaj txog ntawm pawg ntawm cov hlwb hu ua atrioventricular (AV) node.
Kev siv hluav taws xob hauv lub plawv tshwm sim li cas?
Kev coj Txheej txheem. Hluav taws xob impulses los ntawm koj plawv nqaij (lub myocardium) ua rau koj plawv tuav (ntawv cog lus). AV node tshawb xyuas lub teeb liab thiab xa nws los ntawm cov leeg nqaij ntawm lub plawv, ua rau lawv sib cog lus.
Pom zoo:
Tus kws saib xyuas hluav taws xob hluav taws xob ua dab tsi?
Cov kws saib xyuas hluav taws xob oncology tau qhia tshwj xeeb hauv kev kho hluav taws xob thiab ua haujlwm ze nrog koj tus kws kho hluav taws xob hluav taws xob. Ib feem ntawm lawv lub luag haujlwm yog los tshuaj xyuas koj li cas thiab pab koj daws qhov kev hloov pauv hauv koj txoj kev kho mob. Lawv yuav piav qhia thiab pab koj los tswj cov kev mob tshwm sim
Thaum twg yog siv hluav taws xob hluav taws xob thawj zaug?
Keeb kwm ntawm kev siv hluav taws xob hluav taws xob pib nrog Wilhelm Roentgen xyoo 1895. Wilhelm muaj peev xwm ua thawj xoo hluav taws xob, uas yog nws tus poj niam thiab yeej qhov khoom plig Nobel hauv kev siv tshuaj hauv xyoo 1901 vim nws qhov kev tshawb pom tshiab
Puas yog koj siv hluav taws xob tom qab kev kho hluav taws xob?
Qee cov neeg mob qog noj ntshav uas tau txais kev kho hluav taws xob txhawj xeeb tias lawv lub cev yuav dhau los ua "xov tooj cua" tom qab lawv tau txais kev kho hluav taws xob. "Kev siv hluav taws xob me me tuaj yeem siv tau txhua hnub nyob rau ib lub sijhawm txij li ob peb hnub mus rau ntau lub lis piam
Ntev npaum li cas qhov chaw nyob rau hluav taws xob hluav taws xob?
Tom qab koj ua tiav kev xyaum ua haujlwm ib xyoos, koj yuav tsum ua kom tiav 4 xyoo nyob hauv kev kuaj mob. Thaum lub sijhawm koj nyob, koj yuav tsum tau zaum rau ntau qhov kev xeem ua los ntawm American Boardof Radiology. Qhov no suav nrog kev sau ntawv thiab kev hais lus ntawm rooj sab laj thiab kev tshuaj xyuas lub cev
Puas yog hluav taws xob hluav taws xob tsis yog ionizing?
Tsis-ionizing (lossis tsis-ionising) hluav taws xob yog hais txog txhua hom hluav taws xob hluav taws xob uas tsis muaj lub zog txaus rau quantum (photon zog) rau ionize atoms lossis molecules - uas yog, kom tshem tawm cov hluav taws xob los ntawm lub atom lossis molecule