ecg aritmii cardiace 4
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NOTIUNI DE
ELECTROCARDIOGRAFIE
(5)Dr. Viviana Aursulesei
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Fibrilatia atriala Mecanism: neomogenitate a proprietatilor electrofiziologice ale
tesutului atrial cu dezorganizarea depolarizarii atriale
Criterii ecg:
Absenta undelor P sinusale
Prezenta undelor “f” cu frecventa de
400-600/min
Ritm ventricular complet neregulat (in
absenta unui bloc A-V)
Complexe QRS de regula normale
!! Undele “f” ample > 0.5 mm (“coarse f waves”)
- dilatatia atriala
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Calculul frecvenţei ventriculare medii = numărul de complexe cuprinse în 15
cm de înregistrare (6 secunde) x 10
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Flutterul atrial Mecanism: circuit de macroreintrare (miscare circulara)
Criterii ecg
Absenta undelor P sinusale
Prezenta undelor F (“dinti de fierastrau”)
frecventa atriala 250-350/min
(max.400/min)
ritm ventricular regulat/neregulat (functie
de secventa conducerii a-v)
complexe QRS de regula normale
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Flutter atrial cu bloc a-v 2/1
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Flutter atrial-MSC
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Flutter atrial cu bloc a-v variabil
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Flutter atrial cu bloc a-v variabil
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Stimulator migrant atrial
(“Wandering pacemaker”)
Variatii gradate de configuratie ale undei P
Frecventa undelor P< 100/min
Intervale P-R (R-R) regulate/usor
neregulate
Criterii:
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Tahiaritmii supraventriculare cu
aspect particular
Coexistenţa tulburărilor de conducere
intreaventriculare (BRS, BRD)
Coexistenţa sindromului de
preexcitaţie
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Tahiaritmii supraventriculare cu aspect particular (1)
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Tahiaritmii supraventriculare cu aspect particular (2)