Practice Test Geeks(CET) Certified Electrocardiogram Technician Practice Test
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Arrhythmia Recognition & Classification Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A patient's ECG shows a regular rhythm at 150 bpm with narrow QRS complexes and no visible P waves. Which arrhythmia is most likely?

    Answer: Atrial flutter with 2:1 block

    Atrial flutter with 2:1 block typically presents at ~150 bpm with flutter waves that may be hidden within QRS or T waves, producing a regular narrow-complex tachycardia.

  2. Which feature on an ECG best distinguishes Wolff-Parkinson-White (WPW) syndrome from a bundle branch block?

    Answer: Delta wave at the onset of the QRS

    The delta wave — a slurred upstroke at the beginning of the QRS — is the hallmark of WPW caused by ventricular pre-excitation via an accessory pathway.

  3. A rhythm strip shows P waves with at least three distinct morphologies and an irregular rate between 100–150 bpm. This is consistent with:

    Answer: Multifocal atrial tachycardia (MAT)

    MAT is defined by three or more distinct P-wave morphologies with a ventricular rate above 100 bpm, most commonly seen in patients with severe COPD.

  4. On an ECG, second-degree AV block Type II (Mobitz II) is characterized by:

    Answer: Constant PR interval with sudden non-conducted P waves

    Mobitz II features a fixed PR interval followed by an unexpected dropped QRS, indicating infranodal conduction failure and a higher risk of complete heart block.

  5. Which of the following arrhythmias is characterized by 'sawtooth' flutter waves at approximately 300 bpm on the ECG?

    Answer: Atrial flutter

    Atrial flutter produces characteristic sawtooth flutter waves (F waves) at ~300 bpm, best seen in leads II, III, aVF, and V1.

  6. A patient has an ECG showing a regular wide-complex tachycardia at 180 bpm. The QRS morphology is identical to their baseline ECG showing LBBB. This most likely represents:

    Answer: SVT with aberrant conduction

    When wide-complex tachycardia has the same morphology as a pre-existing bundle branch block, SVT with aberrancy is favored over ventricular tachycardia.

  7. An ECG shows regularly spaced P waves that never conduct to the ventricles, with an independent ventricular rate of 38 bpm. This describes:

    Answer: Third-degree (complete) AV block

    Complete (third-degree) AV block features complete dissociation between atrial and ventricular activity, with an escape rhythm maintaining ventricular function.