595133
Question 1
Question
The action potential propagates as a wave of depolarization through the conduction system myocardium. This wave is the electrical signal that triggers myocardial contraction.
Answer
- True
- False
Question 2
Question
Which of the following is FALSE regarding electrocardiography?
Answer
-
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
Question 3
Question
Which of the following are correctly paired? Check all that apply.
Answer
-
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
Question 4
Question
MEA (mean electrical axis) is the dominant direction of atrial activation.
Answer
- True
- False
Question 5
Question
What is the origin of a narrow QRS?
Answer
-
Supraventricular
-
The ventricles
-
Intraventricular conduction delay
Question 6
Question
Which of the following is FALSE regarding arrhythmias?
Answer
-
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
Question 7
Question
What type of arrhythmia does this image represent? Note: this is on 25 mm/sec paper.
Image:
sinus_arrhythmia (image/jpg)
Answer
-
Sinus arrhythmia
-
Sinus tachycardia
-
Sinus bradycardia
-
Sinus arrest
Question 8
Answer
-
Supreventricular Tachycardia (SVT)
-
Supraventricular Tachyarrhythmia (SVTA)
-
Sinus Tachycardia
-
Atrial fibrillation
Question 9
Answer
-
Atrial fibrillation
-
Supraventricular tachyarrhythmia
-
Supraventricular tachycardia
Question 10
Answer
-
Ventricular fibrillation
-
Ventricular tachycardia
-
Atrial fibrillation
-
Sinus arrhythmia
Question 11
Question
How are AV blocks resolved?
Answer
-
They aren't, the patient just lives with it
-
Administration of atropine
-
Exercise
-
They resolve on their own
Question 12
Question
Which of the following is CORRECT?
Answer
-
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
Question 13
Answer
-
1st degree
-
2nd degree
-
3rd degree
Question 14
Answer
-
1st degree
-
2nd degree
-
3rd degree
Question 15
Answer
-
Sick sinus syndrome
-
Hyperkalemic rhythm
-
1st degree AV block
-
Atrial fibrillation
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