EKG certification Certification EKG Arrhythmias & Dysrhythmias 3

Question 1

An EKG shows a regular wide-complex rhythm at 35 bpm with no relationship between P waves and QRS complexes. What is the correct interpretation?

Accepted Answer

Third-degree (complete) heart block with ventricular escape rhythm

Answer

Second-degree AV block Type II

Answer

Accelerated idioventricular rhythm

Answer

Sinus bradycardia with bundle branch block

Question 2

Which arrhythmia is most commonly associated with a prolonged QT interval on the preceding baseline EKG?

Accepted Answer

Torsades de Pointes

Answer

Monomorphic ventricular tachycardia

Answer

Atrial fibrillation

Answer

Supraventricular tachycardia

Question 3

A patient's EKG reveals three or more different P-wave morphologies with varying PR intervals and an irregular ventricular rate. What is the diagnosis?

Accepted Answer

Multifocal atrial tachycardia

Answer

Atrial fibrillation

Answer

Wandering atrial pacemaker

Answer

Frequent premature atrial contractions

Question 4

During continuous monitoring, you observe a sudden onset of regular narrow-complex tachycardia at 170 bpm that terminates abruptly with a vagal maneuver. What is the most likely rhythm?

Accepted Answer

AV nodal reentrant tachycardia (AVNRT)

Answer

Sinus tachycardia

Answer

Atrial flutter

Answer

Ventricular tachycardia

Question 5

What is the significance of capture beats and fusion beats seen during a wide-complex tachycardia?

Accepted Answer

They confirm the rhythm is ventricular tachycardia

Answer

They indicate the rhythm is supraventricular in origin

Answer

They suggest atrial flutter with aberrancy

Answer

They are artifacts and have no diagnostic significance

Question 6

An EKG shows a short PR interval, delta waves, and a wide QRS complex in an asymptomatic patient. Which condition does this pattern indicate?

Accepted Answer

Wolff-Parkinson-White syndrome

Answer

Lown-Ganong-Levine syndrome

Answer

Brugada syndrome

Answer

Hypertrophic cardiomyopathy