RN ATI COMPREHENSIVE EXIT EXAM (VERSIONS 1,
2, 3) WITH 160 NGN QUESTIONS AND REVISED
CORRECT ANSWERS & RATIONALES 2023-2024
100% GUARANTEE PASS
List the 3 basic mechanisms for tachyarrhythmias.
Which is most common? - ....ANSWER >>>>increased
automaticity of pacemaker
spontaneous depolarizations
re-entrant circuit (most common)
List 3 causes of sinus tachycardia. -
Describe the following ECG findings in sinus
tachycardia:
rhythm
rate
QRS duration
P wave
,P-R interval - ....ANSWER >>>>rate is less than 150
beats per minute
What phase of the ventricular action potential
corresponds to the ST segment? - ....ANSWER
>>>>phase 2
During which 2 phases of the ventricular action
potential do spontaneous depolarizations occur? -
....ANSWER >>>>phase 3
phase 4
Reduced function of what channels leads to a
prolonged plateau period, leading to a prolonged QT
interval? - ....ANSWER >>>>potassium channels
A "twisting" polymorphic ventricular tachycardia
that is observed in situations where the QT interval
has been prolonged - ....ANSWER >>>>torsades de
pointes
What fatal disorder is associated with torsades de
points? - ....ANSWER >>>>ventricular fibrillation
,Describe the mechanism of re-entrant circuit
tachyarrhythmia. - ....ANSWER >>>>
List 3 examples of re-entrant arrhythmias. -
....ANSWER >>>>Atria tachycardia
atrial flutter
atrial fibrillation
supraventricular re-entrant tachycardia as in Wolff-
Parkinson-White syndrome
ventricular tachycardia
A 17-year-old boy is referred to a cardiologist by a
primary care physician for evaluation of recurrent
spells of dizziness. During the episodes, he feels
intense anxiety with palpitations and
breathlessness. He is asymptomatic in between
episodes; There is no h/o chest pain or syncope.
Physical examination:
No abnormalities detected
Lab:
EKG: Short PR interval; wide QRS with a slurred
upstroke.
, Blood: Normal; Chest X ray: Normal - ....ANSWER
>>>>Wolff-Parkinson-White syndrome
List 3 ECG findings in Wolff-Parkinson-White
syndrome. - ....ANSWER >>>>short PR interval
wide QRS
delta wave
What is the name of the wide QRS wave with a
slurred upstroke seen in Wolff-Parkinson-White
syndrome? - ....ANSWER >>>>delta wave
- widened QRS signifies pre-excitation
What disorder is caused by an accessory
atrioventricular connection leading to re-entrant
supraventricular tachycardia? - ....ANSWER
>>>>Wolff-Parkinson-White syndrome
Compare Wolff-Parkinson-White syndrome to long
QT syndrome. - ....ANSWER >>>>
A 46-year-old woman arrived in the ER complaining
of sudden onset of palpitations, lightheadedness,
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