CEN Cardiovascular Emergencies 2

Question 1

A patient arrives in rapid atrial fibrillation with a rate of 160 bpm and is hemodynamically unstable. What is the most appropriate immediate intervention?

Accepted Answer

Perform synchronized cardioversion

Answer

Administer diltiazem 0.25 mg/kg IV

Answer

Administer amiodarone 150 mg IV over 10 minutes

Answer

Initiate rate control with metoprolol

Question 2

Which serum biomarker is most specific for myocardial necrosis and is elevated within 3–6 hours of an acute MI?

Accepted Answer

Troponin I

Answer

CK-MB

Answer

Myoglobin

Answer

LDH

Question 3

A patient with chest pain has a 12-lead ECG showing ST depression in V1–V4. Which condition should be considered first?

Accepted Answer

Posterior MI

Answer

Anterior STEMI

Answer

Right ventricular infarction

Answer

Pericarditis

Question 4

What is the initial energy setting for defibrillation of ventricular fibrillation using a biphasic defibrillator?

Accepted Answer

200 J

Answer

100 J

Answer

360 J

Answer

50 J

Question 5

Which sign is associated with cardiac tamponade in addition to hypotension and muffled heart sounds?

Accepted Answer

Jugular venous distension

Answer

Kussmaul's sign

Answer

Pulsus alternans

Answer

Tracheal deviation

Question 6

A patient converts from VF to a normal sinus rhythm after resuscitation. Which post-cardiac arrest intervention has the strongest evidence for improving neurological outcomes?

Accepted Answer

Targeted temperature management (32–36°C)

Answer

Immediate coronary angiography

Answer

High-dose epinephrine infusion

Answer

Prophylactic anticonvulsants