Atrioventricular conduction and arrhythmias at the initiation of beating in embryonic mouse hearts.
Atrioventricular conduction and arrhythmias at the initiation of beating in embryonic mouse hearts.
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DOI:
10.1002/dvdy.22319
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发表时间:
2010-07
影响因子:
2.5
通讯作者:
Weiss, James N.
中科院分区:
文献类型:
--
作者:
Chen, Fuhua;De Diego, Carlos;Chang, Marvin G.;McHarg, Jennifer L.;John, Scott;Klitzner, Thomas S.;Weiss, James N.
关键词:
To investigate cardiac physiology at the onset of heart beating in embryonic mouse hearts, we performed optical imaging of membrane potential (Vm) and/or intracellular calcium (Cai). Action potentials and Cai transients were detected in ~50% of mouse embryo hearts at E8.5, but in all hearts at E9.0, indicating that beating typically starts between E8–E9. Beating was eliminated by Ca channel blocker nifedipine and the If blocker ZD7288, unaffected by tetrodotoxin and only mildly depressed by disabling sarcoplasmic (SR) and endoplasmic (ER) reticulum Ca cycling. From E8.5 to E10, conduction velocity increased from 0.2–1 mm/s to >5 mm/s in first ventricular and then atrial tissue, while remaining slow in other areas. Arrhythmias included atrioventricular reentry induced by adenosine. In summary, at the onset of beating, If dependent pacemaking drives both AP propagation and Cai transient generation through activation of voltage-dependent Ca channels. Na channels and intracellular Ca cycling have minor roles.
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DOI:
10.1002/ar.a.20108
发表时间:
2004-10-01
期刊:
ANATOMICAL RECORD PART A-DISCOVERIES IN MOLECULAR CELLULAR AND EVOLUTIONARY BIOLOGY
影响因子:
--
作者:
Efimov, IR;Nikolski, VP;Boyett, M
通讯作者:
Boyett, M
影响因子:
37.8
作者:
Srinivasan, S;Baldwin, HS;Turnbull, DH
通讯作者:
Turnbull, DH
影响因子:
11.4
作者:
Herrmann, Stefan;Stieber, Juliane;Ludwig, Andreas
通讯作者:
Ludwig, Andreas
影响因子:
5
作者:
KLITZNER, TS;CHEN, FH;FRIEDMAN, WF
通讯作者:
FRIEDMAN, WF
DOI:
10.1016/j.ancard.2006.02.007
发表时间:
2006-04-01
期刊:
Annales de Cardiologie et d'Angeiologie
影响因子:
--
作者:
Raddatz, E.;Gardier, S.;Sarre, A.
通讯作者:
Sarre, A.