CRAT Atrial Arrhythmia Identification 2

Question 1

Which atrial arrhythmia is characterized by a sawtooth pattern at a rate of 250-350 bpm on the ECG?

Accepted Answer

Atrial flutter

Answer

Atrial flutter produces the classic sawtooth flutter waves (F waves) at 250-350 bpm, best visible in leads II, III, aVF, and V1.

Question 2

In atrial fibrillation, which ECG finding is most characteristic?

Accepted Answer

Irregularly irregular rhythm with absent distinct P waves

Answer

Atrial fibrillation produces an irregularly irregular ventricular rhythm and replaces distinct P waves with chaotic fibrillatory f waves at 350-600 bpm.

Question 3

A rhythm strip shows P wave morphology varying in at least three different shapes with an irregular rate above 100 bpm. What arrhythmia is present?

Accepted Answer

Multifocal atrial tachycardia

Answer

Multifocal atrial tachycardia (MAT) is defined by three or more distinct P wave morphologies, an irregular rhythm, and a rate greater than 100 bpm.

Question 4

Paroxysmal supraventricular tachycardia (PSVT) most commonly has which ventricular rate range?

Accepted Answer

150-250 bpm

Answer

PSVT characteristically presents with a sudden-onset, regular tachycardia at 150-250 bpm with narrow QRS complexes unless aberrant conduction is present.

Question 5

A P wave with negative deflection in lead I and positive deflection in aVR most likely indicates which condition?

Accepted Answer

Ectopic atrial rhythm originating from the left atrium

Answer

A negative P wave in lead I and positive in aVR suggests retrograde or left-sided atrial activation, characteristic of a left atrial ectopic focus.

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT Atrial Arrhythmia Identification 2