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NYU LANGONE EKG EXAM
QUESTIONS & ANSWERS
Question: A delayed conduction of the AV node is
manifested by a:
- prolonged PR interval
- widened QRS
- inverted P wave
- absence of a P wave
CORRECT ANSWER: a. prolonged PR interval
Question: Which of the following waveforms represent
the electrical event that should initiate ventricular contraction?
CORRECT ANSWER: QRS complex
Question: What is the normal range of the PR interval?
CORRECT ANSWER: 0.12-0.20
Question: What is the normal length of the QRS interval?
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CORRECT ANSWER: below 0.12
Question: What bpm rate is Sinus Tachycardia on a strip?
CORRECT ANSWER: 101-160 bpm
Question: Which of the following describes a cells ability
to spontaneously generate an impulse?
CORRECT ANSWER: automaticity
Question: Which node independently conducts a rate of
40-60 in an adult patient?
CORRECT ANSWER: AV node
Question: Which node independently conducts a rate of
60-100 in an adult patient?
CORRECT ANSWER: SA node 'the pacemaker of the
heart'
Question: What does the T-wave represent?
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CORRECT ANSWER: ventricle repolarization
Question: What is the normal PQRS ratio?
CORRECT ANSWER: 1:1
Question: What is the rate on a strip for sinus
bradycardia?
CORRECT ANSWER: less than 60 bpm
Question: How do you calculate the rate on a strip?
CORRECT ANSWER: multiply the number of QRS's by
10, pay attention to marks on strip to count right
Question: How to differentiate between normal sinus
rhythm and sinus arrhythmia
CORRECT ANSWER: the distance between each R
(peak in QRS wave) is different and NOT the same within a strip
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Question: the activation of BLANK system causes in a
release in epinephrine which results in an increase in heart rate, blood pressure, and cardiac output
CORRECT ANSWER: sympathetic nervous system
Question: the QRS on an EKG corresponds to which of
the following electrical events:
- ventricular depolarization
- ventricular repolarization
- atrial repolarization
- atrial depolarization
CORRECT ANSWER: a. ventricular depolarization
Question: Ineffective atrial contractions are associated
with which rhythm
- normal sinus with PAC
- normal sinus with PVC
- ventricular fibrillation
- atrial fibrillation