EKG certification Certification EKG Arrhythmias & Dysrhythmias 2

Question 1

A patient's EKG shows a regular rhythm with sawtooth-shaped flutter waves at a rate of 300 bpm and a ventricular rate of 150 bpm. What is the most likely diagnosis?

Accepted Answer

Atrial flutter with 2:1 block

Answer

Atrial fibrillation with rapid ventricular response

Answer

Supraventricular tachycardia

Answer

Multifocal atrial tachycardia

Question 2

Which arrhythmia is characterized by the absence of P waves and an irregularly irregular rhythm on EKG?

Accepted Answer

Atrial fibrillation

Answer

Atrial flutter

Answer

Junctional rhythm

Answer

Wandering atrial pacemaker

Question 3

On a rhythm strip, you observe a wide-complex tachycardia at 180 bpm with AV dissociation. What is the most likely interpretation?

Accepted Answer

Ventricular tachycardia

Answer

SVT with aberrant conduction

Answer

Atrial flutter with bundle branch block

Answer

Wolff-Parkinson-White syndrome

Question 4

A patient presents with a heart rate of 40 bpm, a regular rhythm, and narrow QRS complexes with no visible P waves. What rhythm is most likely?

Accepted Answer

Junctional escape rhythm

Answer

Third-degree heart block

Answer

Sinus bradycardia

Answer

Idioventricular rhythm

Question 5

Which EKG finding is most characteristic of Torsades de Pointes?

Accepted Answer

Polymorphic QRS complexes that appear to twist around the baseline

Answer

Monomorphic wide QRS complexes at a regular rate

Answer

Narrow QRS complexes with delta waves

Answer

Alternating tall and short QRS complexes with a normal axis

Question 6

A patient's EKG shows progressively lengthening PR intervals until a QRS complex is dropped, followed by a shorter PR interval. What type of heart block is this?

Accepted Answer

Second-degree AV block Type I (Wenckebach)

Answer

Second-degree AV block Type II

Answer

Third-degree AV block

Answer

First-degree AV block