
QUIZZ DE CIENCIAS BASICAS CARDIO 02
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
¿Cuál de las siguientes ondas o segmentos en un electrocardiograma (EKG) representa la despolarización de los ventrículos?
A) Onda P
B) Complejo QRS
C) Segmento ST
D) Onda T
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Durante la fase 0 del potencial de acción del miocito ventricular, el evento iónico predominante es:
A. Ingreso de Ca²⁺ por canales tipo L
B. Salida de K⁺ por IKr/IKs
C. Ingreso rápido de Na⁺ por canales rápidos (INa)
D. Corriente If (HCN)
E. Activación de la bomba Na⁺/K⁺-ATPasa
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el orden de mayor a menor velocidad de conducción?
A. Atria > Purkinje > Ventrículos > Nodo AV
B. Nodo AV > Purkinje > Atria > Ventrículos
C. Purkinje > Atria > Ventrículos > Nodo AV
D. Ventrículos > Atria > Purkinje > Nodo AV
E. Purkinje > Ventrículos > Atria > Nodo AV
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Paciente con K⁺ sérico 6.3 mEq/L, asintomático. Hallazgo más habitual temprano en EKG:
A. Onda T picuda y simétrica
B. PR corto
C. Onda U prominente
D. Elevación difusa del ST
E. Ensanchamiento del QRS sin cambio en T
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál patrón sugiere desviación izquierda del eje?
A. DI –, aVF +
B. DI +, aVF –, aVL +
C. DI –, aVF –
D. DI +, aVF +
E. DI –, aVR +
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tira de ritmo: intervalos PR progresivamente se alargan hasta una onda P no conducida, y el ciclo se repite. Diagnóstico:
A. Bloqueo AV de 1º grado
B. Bloqueo AV de 2º grado Mobitz II
C. Bloqueo AV de 3º grado
D. Bloqueo AV de 2º grado Mobitz I (Wenckebach)
E. Ritmo de la unión
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