Exam (elaborations)
PCCN practice exam QUESTIONS AND ANSWERS (2024/2025) (VERIFIED ANSWERS)
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PCCN practice exam QUESTIONS AND ANSWERS (2024/2025) (VERIFIED ANSWERS)
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PCCN practice exam1. Pt on Vtach, HR 135, RR 32, BP 90/48, conscious but c/o dizziness,
recent K+ lvl is 3.4. What action would you do first?
a. emergent defib
b. amio 300mg IVP
c. emergent cardioversion
d. hang 10 mEq KCL/50mL D5W: C
2. The nurse notes the following when analyzing a patient's telemetry strip:
HR, 65/min and regular; PR interval, 0.22 seconds; QRS complex, 0.10
seconds; QTc, 0.52 seconds. Which of the following dysrhythmias is the
patient at risk for?
A. Atrial fibrillation because the PR interval is wide
B. Sinus arrhythmia because the QRS complex is narrow
C. Torsades de pointes because the QTc is wide
,D. Third-degree heart block because the PR interval is narrow: C.
QT measurements reflect the duration of ventricular repolarization.
Lengthening of QT interval is associated with arrhythmias, adverse
cardiac events, and increased mortality because a longer QT duration
places the vulnerable ventricular repolariza- tion phase close to the
next depolarization, increasing the likelihood of R-on-T. The most
common arrhythmia that occurs with prolonged QTc is torsades de
pointes.
Atrial fibrillation, sinus bradycardia, and third-degree heart block are
not typically associated with prolonged ventricular repolarization (QTc
>0.50 seconds).
3. A patient with chronic obstructive pulmonary disease (COPD) is
admitted for worsening dyspnea and possible pneumonia. The current ABG
results are pH, 7.19; PaO2, 52 mm Hg; PaCO2, 68 mm Hg; HCO3 - , 32
, mmol/L. The nurse would interpret these results as
A. Metabolic acidosis with hypoxemia
B. Respiratory acidosis with hypoxemia
C. Respiratory alkalosis with typical oxygenation for a COPD patient
D. Metabolic alkalosis with typical oxygenation for a COPD patient: B.
Based on the ABG analysis, the patient is experiencing a respiratory
acidosis with hypoxemia most likely due to the pneumonia. A pH of 7.19
indicates acidosis; a PaCO2 of 68 mm Hg is elevated and a cause of
acidosis; an HCO3 - of 32 mmol/L indicates renal compensation; a PaO2
of 52 mm Hg indicates hypoxemia
4. 76-year-old patient is receiving gentamicin and linezolid for an
infection. Which of the following potential complications is the most
important for the nurse to monitor this patient for?
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