Qhov sib txawv tseem ceeb ntawm Chronotropic thiab Dromotropic yog tias cov tshuaj chronotropic cuam tshuam rau lub plawv dhia thaum cov tshuaj dromotropic cuam tshuam rau kev tshaj tawm lossis qhov ceev ntawm cov hluav taws xob impulse los ntawm cov ntaub so ntswg. Tsis tas li ntawd, cov tshuaj chronotropic cuam tshuam rau cov hluav taws xob conduction ntawm lub plawv thiab cov hlab ntsha thaum cov tshuaj dromotropic cuam tshuam rau atrioventricular node (AV node) conduction.
Kab mob ntsig txog lub plawv thiab cov hlab ntsha yog lub npe hu ua kab mob plawv. Lub plawv nres, lub plawv tsis ua haujlwm, arrhythmias, cardiomyopathy, angina, thiab mob stroke yog qee yam ntawm lawv. Cov kws kho mob tau sau cov tshuaj mob plawv txhawm rau tiv thaiv cov kab mob saum toj no thiab ua kom koj lub plawv noj qab nyob zoo. Muaj peb hom tshuaj mob plawv hauv cov tshuaj kho mob. Chronotropic thiab Dromotropic yog ob hom ntawm lawv.
Chronotropic yog dab tsi?
Chronotropic yog ib hom tshuaj mob plawv uas tuaj yeem hloov lub plawv dhia. Qhov no yog ua los ntawm kev hloov cov ion channel xws li sodium channels, potassium channels, thiab calcium channels kom tso cai ntau dua los yog tsawg dua ions ntws hauv plawv pacemaker hlwb. Muaj ob hom tshuaj chronotropic uas yog cov tshuaj zoo chronotropic thiab cov tshuaj tsis zoo chronotropic. Lub plawv dhia nce los ntawm cov tshuaj chronotropic. Ntawm qhov tod tes, lub plawv dhia txo qis los ntawm cov tshuaj tsis zoo chronotropic.
Daim duab 01: Lub Siab Rate
Feem ntau cov adrenergic agonists, atropine, dopamine, epinephrine, isoproterenol, milrinone yog ntau yam tshuaj chronotropic zoo. Metoprolol, acetylcholine, digoxin, diltiazem thiab verapamil yog cov tshuaj tsis zoo chronotropic.
Dromotropic yog dab tsi?
Dromotropic yog ib hom tshuaj ntawm cov tshuaj mob plawv uas hloov cov kev tshaj tawm. Hauv lwm lo lus, cov tshuaj no hloov pauv kev mus ncig ceev ntawm impulses los ntawm SA node rau AV node. AV node yog cov ntaub so ntswg tshwj xeeb heev.
Daim duab 02: SA Node thiab AV Node
Ob hom tshuaj dromotropic pom yog cov tshuaj zoo dromotropic thiab cov tshuaj tsis zoo dromotropic. Thawj hom nce qhov kev tshaj tawm kev tshaj tawm thaum tom kawg txo qis kev tshaj tawm.
Dab tsi zoo sib xws ntawm Chronotropic thiab Dromotropic?
- Ob qho tib si Chronotropic thiab Dromotropic yog ob hom tshuaj mob plawv siv los kho cov kab mob plawv.
- Kev noj ntau dhau ntawm ob cov tshuaj tuaj yeem ua rau muaj ntau yam kab mob.
- Ob hom tshuaj muaj ob hom; zoo thiab tsis zoo.
Qhov txawv ntawm Chronotropic thiab Dromotropic yog dab tsi?
Chronotropic tshuaj yog cov tshuaj mob plawv uas cuam tshuam rau lub plawv dhia. Dromotropic tshuaj yog cov tshuaj mob plawv uas cuam tshuam rau qhov kev tshaj tawm. Yog li ntawd, cov tshuaj Chronotropic hloov lub plawv dhia thiab atherosclerosis thaum Dromotropic tshuaj hloov qhov ceev ntawm impulses hloov los ntawm SA node rau AV node.
Tsis tas li ntawd, cov tshuaj chronotropic cuam tshuam rau cov hluav taws xob conduction ntawm lub plawv thiab cov hlab ntsha thaum cov tshuaj dromotropic cuam tshuam rau atrioventricular node (AV node) conduction. Muaj cov tshuaj zoo thiab tsis zoo hauv ob qho tshuaj no. Qhov zoo chronotropes nce lub plawv dhia thaum tsis zoo chronotropes txo lub plawv dhia. Txawm li cas los xij, qhov zoo dromotrope nce AV nodal conduction thaum tsis zoo dromotrope txo AV nodal conduction.
Summary – Chronotropic vs Dromotropic
Muaj peb hom tshuaj mob plawv raws li lawv siv rau kev kho mob plawv. Lawv yog cov tshuaj inotropic, chronotropic thiab dromotropic tshuaj. Cov tshuaj Chronotropic cuam tshuam rau lub plawv dhia los ntawm kev hloov cov ion channel kom nce lossis txo cov ion ntws mus rau cov pacemaker hlwb. Dromotropic tshuaj hloov qhov kev tshaj tawm kev tshaj tawm lossis kev ceev ntawm kev mus ncig ntawm lub zog ntawm SA node rau AV node. Qhov no yog qhov txawv ntawm cov tshuaj chronotropic thiab dromotropic.
