Download - Electrocardiograma».pptx
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Dr. Julio Mendoza PRESENTADO:
CATEDRA DE ANESTESIOLOGIA
Bautista Zamata, MarielaCahuapaza Apaza, SimbliciaCalizaya Flores, Cristian
EdwinPeralta Ticona ,Valentin
«Electrocardiograma»
2015
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ONDA P Despolarización auricularRedondaDuración: 0.10 seg (2.5 mm)Voltaje máx: 0.25mV (2.5 mm)Positiva en casi todas las
derivaciones
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Complejo QRSDespolarización ventrículosRedondaDuración: 0.6-10 seg (2.5
mm)Altamente variable
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Q, R, S: > 5 mmq, r, s: < 5 mmOndas extra Q’ R’ S’
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Onda TRepolarización ventrículosPositiva en casi todas las
derivacionesExcepto en:
aVR, donde es negativa
Onda UPositiva, de escaso voltajeObservable en derivaciones
precordialesLe sigue a la TRepolarización músculos
papilares
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INVERVALOS
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• En el ritmo sinusal se mantiene constante• Sirve para calcular la FC= 300/# gdes.
INTERVALO RR
• Retraso fisiológico paso nodo AV• Duración: 0.12-0.20 seg c/FC 60-70• > 0.20 seg bloqueo AV
INTERVALO PR o PQ
• Período de inactividad• Separa la despolarización de la repolarización
ventricular
INTERVALO ST
• Representa la despolarización y repolarización de los ventrículos
• Duración: 0.44 seg
INTERGALO QT
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EKG normal