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

Left anterior descending artery

Answer

Left circumflex artery

Answer

Left main 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

Check the pulse for 10 seconds

Answer

Administer amiodarone 300 mg IV

Answer

Obtain a 12-lead ECG

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

Blocks sodium channels to slow conduction

Answer

Increases vagal tone by stimulating the carotid sinus

Answer

Prolongs the refractory period of ventricular myocytes

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

Nitroglycerin IV infusion

Answer

Furosemide 80 mg IV push

Answer

Metoprolol tartrate 5 mg IV

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

Administer sodium polystyrene sulfonate (Kayexalate)

Answer

Initiate hemodialysis

Answer

Administer sodium bicarbonate IV

Question 6

During transcutaneous pacing, the nurse notes electrical capture but the patient remains unresponsive. What is the most likely explanation?

Accepted Answer

Mechanical capture has not been achieved

Answer

The pacemaker output is set too low

Answer

The pacing rate is too slow

Answer

Lead placement is incorrect

Question 7

A patient with known coronary artery disease develops new left bundle branch block (LBBB) with chest pain. How should this be managed?

Accepted Answer

Treat as a STEMI equivalent and activate the cath lab

Answer

Observe and repeat ECG in 6 hours

Answer

Administer aspirin only and admit for monitoring

Answer

Perform immediate synchronized cardioversion