BCEN Cardiac Emergencies 2

Question 1

A patient presents with chest pain, diaphoresis, and an ECG showing 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 occlusion of the right coronary artery.

Question 2

A patient in ventricular fibrillation receives a defibrillation shock. Which action should the nurse take immediately after shock delivery?

Accepted Answer

Resume CPR immediately starting with chest compressions

Answer

After defibrillation, CPR should be resumed immediately without a pulse check, as per current AHA guidelines, starting with chest compressions.

Question 3

Which of the following best describes the mechanism of action of adenosine when used to treat SVT?

Accepted Answer

Temporarily blocks AV nodal conduction to interrupt reentry circuits

Answer

Adenosine transiently blocks AV nodal conduction, interrupting the reentry circuit responsible for most SVTs.

Question 4

A patient with acute heart failure has a BP of 88/60 mmHg and bilateral crackles. Which medication is most appropriate to initiate?

Accepted Answer

Dobutamine IV infusion

Answer

In cardiogenic shock with hypotension, dobutamine is the preferred agent as it provides inotropic support without further reducing blood pressure.

Question 5

A patient is admitted with a serum potassium of 6.8 mEq/L and peaked T waves on ECG. Which intervention should be performed FIRST?

Accepted Answer

Administer calcium gluconate IV

Answer

Calcium gluconate is given first to stabilize the cardiac membrane and protect against life-threatening arrhythmias from hyperkalemia.

(BCEN) Board of Certification of Emergency Nursing Practice Test

(BCEN) Board of Certification of Emergency Nursing Practice Test

BCEN Cardiac Emergencies 2