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7/21/2019 Axul Electric Al Inimii
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Axulelectric al
inimii
7/21/2019 Axul Electric Al Inimii
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Axul electric al inimiieste vectorul mediude depolarzare
ventriculara(QRS) inplan frontal.
1.Denitie
7/21/2019 Axul Electric Al Inimii
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frontal se aa intre
-1! si " #$!% cu micivariatii in functie detipul constitutional.
&onformA.&.'uton%.D. Axa
electrica aventriculilor normalise situeaza la #!
2.Valori
7/21/2019 Axul Electric Al Inimii
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.+devire dreapta sau
cord verticalizat,.valoare-1!+deviere stana sau
cord orizontalizatax orizontalizat/
o0ezi%ravideax verticalizat/ tineri
3.Modifcari
7/21/2019 Axul Electric Al Inimii
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pe doua dintre
derivatiile standardsau doua dintrederivatiile unipolare
ale mem0relor.u o0ipolara cu o
unipolara 2
4.Determinare
7/21/2019 Axul Electric Al Inimii
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1.Se calculeaza mediavectorului dedepolarizare
ventriculara pe ,dintre derivatiile
alese( sumaale0rica)
Metoda triunghiului Einthoven
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R+ 0S+-c
suma+ 0-a-c+x4om proiecta un vector
de lunime x pederivatiacorespunzatoare%din
centrul derivatiei spreelectrodulcorespunzator.
7/21/2019 Axul Electric Al Inimii
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afam ducand
0isectoarele dinecare un5i de 6$ !al triun5iului%pe
latura opusa .7ocul de intersectie al
0isectoarelorreprezinta centrultriun5iului.
7/21/2019 Axul Electric Al Inimii
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perpendiculare din
varful ecarui vectorproiectat pana inpunctul unde acestea
se intersecteaza.Se uneste centrul
triun5iului cupunctul de intersectieal perpendicularelor.
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7/21/2019 Axul Electric Al Inimii
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2.Metoda sistemului de reerinta
hexaxial
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%punct de aplicare din
centrul cercului.Se co0oaraperpendiculare din
varful vectorilor panala intersectie.
Se uneste centrulcercului cu punctul deintersectie o0tinut.
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Se cauta pe cele 6
derivatii frontale uncomplex
ec5idifazic.Aceea estederivatia care vedecordul su0 un un5i
de #$!.
3.Metoda rapida
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paralela cu axa
electrica a inimii.D1 a48D, a48
D9 a4R-un5i
maxim+proiectie min-un5iminim+proiectie max
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1.la terminarea unei
expiratii profunde,.persoana este inpozitie
orizontala(continutula0d impine in sus
diaframul)9.persoane scunde sisupraponderale
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dreapta a cordului
survine/1.la terminarea uneiinspiratii profunde
,.cand persoana seaa in pozitie
verticala9.la persoane inalte%loniline
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devierea axului inimiicatre partea
respectiva. asamusculara mai
mare+pot.electricsuplimentar+duratamai mare dedepolarizare+vectorputernic orientat spre
partea 5ipertroata.
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4oicu AdrianaSeria ;4'rupa <,