595133
Pregunta 1
Pregunta
The action potential propagates as a wave of depolarization through the conduction system myocardium. This wave is the electrical signal that triggers myocardial contraction.
Respuesta
- True
- False
Pregunta 2
Pregunta
Which of the following is FALSE regarding electrocardiography?
Respuesta
-
It provides information about cardiac size (hypertrophy) and the mean vector (direction) of ventricular or atrial activation (mean electrical axis-MEA)
-
Is indicated when the heart rate is too high, too slow, or the rhythm is inappropriately irregular
-
A wave of depolarization directed towards the positive electrode of a lead results in a positive deflection on the EKG
-
The normal heart depolarizes from left to right, cranial to caudal, and dorsal to ventral
Pregunta 3
Pregunta
Which of the following are correctly paired? Check all that apply.
Respuesta
-
Atrial depolarization- P wave
-
Atrial depolarization- QRS complex
-
Atrial depolarization- T wave
-
Ventricular depolarization- QRS complex
-
Ventricular depolarization- P wave
-
Ventricular depolarization- T wave
-
Ventricular repolarization- T wave
-
Ventricular repolarization- QRS complex
-
Ventricular repolarization- P wave
Pregunta 4
Pregunta
MEA (mean electrical axis) is the dominant direction of atrial activation.
Respuesta
- True
- False
Pregunta 5
Pregunta
What is the origin of a narrow QRS?
Respuesta
-
Supraventricular
-
The ventricles
-
Intraventricular conduction delay
Pregunta 6
Pregunta
Which of the following is FALSE regarding arrhythmias?
Respuesta
-
Develop when the conduction system prevents initiation or propagation of the wave front
-
They are clinically important because they can be responsible for clinical signs including syncope, low cardiac output, and sudden cardiac death
-
Tachyarrhythmias develop with high vagal tone
-
Bradyarrhythmias develop when disease of the conduction system slows the rate of depolarization or "blocks" conduction
Pregunta 7
Pregunta
What type of arrhythmia does this image represent? Note: this is on 25 mm/sec paper.
Image:
sinus_arrhythmia (image/jpg)
Respuesta
-
Sinus arrhythmia
-
Sinus tachycardia
-
Sinus bradycardia
-
Sinus arrest
Pregunta 8
Respuesta
-
Supreventricular Tachycardia (SVT)
-
Supraventricular Tachyarrhythmia (SVTA)
-
Sinus Tachycardia
-
Atrial fibrillation
Pregunta 9
Respuesta
-
Atrial fibrillation
-
Supraventricular tachyarrhythmia
-
Supraventricular tachycardia
Pregunta 10
Respuesta
-
Ventricular fibrillation
-
Ventricular tachycardia
-
Atrial fibrillation
-
Sinus arrhythmia
Pregunta 11
Pregunta
How are AV blocks resolved?
Respuesta
-
They aren't, the patient just lives with it
-
Administration of atropine
-
Exercise
-
They resolve on their own
Pregunta 12
Pregunta
Which of the following is CORRECT?
Respuesta
-
1st degree AV block: PR prolongation 2nd degree AV block: complete failure of AV conduction 3rd degree AV block: intermittent failure of AV conduction
-
1st degree AV block: complete failure of AV conduction 2nd degree AV block: intermittent failure of AV conduction 3rd degree AV block: PR prolongation
-
1st degree AV block: PR prolongation 2nd degree AV block: intermittent failure of AV conduction 3rd degree AV block: complete failure of AV conduciton
-
1st degree AV block: complete failure of AV conduction 2nd degree AV block: PR prolongation 3rd degree AV block: intermittent failure of AV conduction
Pregunta 13
Respuesta
-
1st degree
-
2nd degree
-
3rd degree
Pregunta 14
Respuesta
-
1st degree
-
2nd degree
-
3rd degree
Pregunta 15
Respuesta
-
Sick sinus syndrome
-
Hyperkalemic rhythm
-
1st degree AV block
-
Atrial fibrillation
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