CRAT - Certified Rhythm Analysis Technician Ventricular Arrhythmia Identification Questions and Answers

Question 1

A rhythm analysis technician observes a wide, bizarre QRS complex measuring 0.14 seconds on a patient's EKG. The beat occurs earlier than the next expected sinus beat, is not preceded by a P wave, and is followed by a pause. What is this single beat best described as?

Accepted Answer

Premature Ventricular Contraction (PVC)

Answer

This describes a Premature Ventricular Contraction (PVC). The key features are its premature nature, a wide QRS complex (≥0.12 seconds) due to its ventricular origin, the absence of a preceding P wave, and a subsequent compensatory pause.

Question 2

A patient's rhythm strip shows a regular rhythm with a rate of 35 bpm. The QRS complexes are wide (0.16 seconds) and there are no discernible P waves associated with the QRS complexes. Which rhythm is most likely present?

Accepted Answer

Idioventricular Rhythm

Answer

Idioventricular Rhythm (IVR), also known as a ventricular escape rhythm, is characterized by a rate of 20-40 bpm, wide QRS complexes, and the absence of P waves. It occurs when higher pacemakers fail and the ventricles must pace the heart.

Question 3

Which of the following ECG characteristics is the most definitive feature of Ventricular Fibrillation (VF)?

Accepted Answer

Chaotic, disorganized electrical activity with no identifiable P, QRS, or T waves.

Answer

Ventricular Fibrillation is defined by its chaotic and disorganized nature. On the ECG, there are no discernible waves (P, QRS, T); instead, the baseline is wavy and chaotic, reflecting the quivering, uncoordinated contraction of the ventricles.

Question 4

A technician is analyzing a rhythm strip and notes a run of three or more consecutive wide-complex beats at a rate of 140 bpm. The rhythm is regular. This finding is best classified as:

Accepted Answer

Ventricular Tachycardia (VT)

Answer

Ventricular Tachycardia (VT) is defined as a rhythm with three or more consecutive beats of ventricular origin at a rate greater than 100 bpm. AIVR has a rate of 41-100 bpm, and while SVT with aberrancy has a wide QRS, the description points directly to the definition of VT.

Question 5

A patient with a known prolonged QT interval develops a rapid, polymorphic ventricular tachycardia. On the monitor, the technician notes that the QRS complexes appear to be twisting around the isoelectric baseline. What is this specific arrhythmia called?

Accepted Answer

Torsades de Pointes

Answer

Torsades de Pointes, which means "twisting of the points," is a specific type of polymorphic ventricular tachycardia that occurs in the setting of a prolonged QT interval. Its hallmark feature on the ECG is the QRS axis swinging from one direction to another, creating a twisting appearance.

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Ventricular Arrhythmia Identification Questions and Answers