CEN Certified Emergency Nurse MCQ 2

Question 1

A patient presents with ST-elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?

Accepted Answer

Right coronary artery

Answer

ST elevation in leads II, III, and aVF indicates an inferior STEMI, most commonly caused by right coronary artery (RCA) occlusion.

Question 2

Which finding on a 12-lead ECG most urgently requires immediate defibrillation?

Accepted Answer

Ventricular fibrillation

Answer

Ventricular fibrillation produces no effective cardiac output and requires immediate unsynchronized defibrillation.

Question 3

A child presents with inspiratory stridor, a barking cough, and low-grade fever. What is the priority intervention?

Accepted Answer

Administer dexamethasone and allow the child to remain with caregiver

Answer

Croup is managed with corticosteroids (dexamethasone) and keeping the child calm; separating the child from the caregiver increases agitation and worsens stridor.

Question 4

Which lab value is most indicative of rhabdomyolysis requiring aggressive IV fluid resuscitation?

Accepted Answer

Elevated creatine kinase (CK)

Answer

Markedly elevated CK indicates extensive muscle breakdown characteristic of rhabdomyolysis, and IV fluids protect the kidneys from myoglobin-induced injury.

Question 5

A patient in anaphylaxis has received epinephrine 1:1,000 IM but symptoms persist. What is the next priority action?

Accepted Answer

Repeat epinephrine 1:1,000 IM in 5–15 minutes

Answer

A second dose of epinephrine IM can be given 5–15 minutes after the first if the patient does not improve, as epinephrine is the first-line treatment for anaphylaxis.

CEN - Certified Emergency Nurse Practice Test

CEN - Certified Emergency Nurse Practice Test

CEN Certified Emergency Nurse MCQ 2