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

Sawtooth flutter waves at 300 bpm with a ventricular rate of 150 bpm indicate atrial flutter with 2:1 conduction block.

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 fibrillation is defined by absent P waves replaced by fibrillatory waves and an irregularly irregular ventricular rhythm.

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

AV dissociation in the setting of a wide-complex tachycardia is highly indicative of ventricular tachycardia.

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

A regular narrow-complex rhythm at 40 bpm without visible P waves is consistent with a junctional escape 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

Torsades de Pointes is a polymorphic ventricular tachycardia with QRS complexes that rotate around the isoelectric baseline, creating a twisting appearance.

EKG certification Practice Test

EKG certification Practice Test

EKG certification Certification EKG Arrhythmias & Dysrhythmias 2