Practice Test Geeks(CET) Certified EKG Technician Practice Test
← All CET Flashcard Decks

EKG Technician Skills and Knowledge Base 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.

Read the first 7 EKG Technician Skills and Knowledge Base flashcards as text

  1. Which lead placement error would cause an inverted P wave in lead I?

    Answer: Right and left arm electrodes reversed

    Reversing the right and left arm electrodes inverts the polarity of lead I, causing a negative P wave where it should be positive.

  2. A patient has a heart rate of 150 bpm with narrow QRS complexes and no visible P waves. Which rhythm is most likely?

    Answer: Junctional tachycardia

    Junctional tachycardia presents with a rate of 100–180 bpm, narrow QRS, and absent or retrograde P waves.

  3. What is the normal PR interval range on an adult EKG?

    Answer: 0.12–0.20 seconds

    The normal PR interval is 0.12–0.20 seconds (3–5 small boxes), representing atrial depolarization and AV node conduction.

  4. During a Holter monitor application, why is it important to abrade the skin before attaching electrodes?

    Answer: To remove dead skin cells and oils that increase impedance

    Light skin abrasion removes the outer epidermal layer and oils, lowering electrical impedance and improving signal quality.

  5. Which of the following is a characteristic of first-degree AV block?

    Answer: PR interval greater than 0.20 seconds with every P wave conducted

    First-degree AV block is defined by a consistently prolonged PR interval (>0.20 s) with every P wave followed by a QRS.

  6. Which precordial lead is placed at the 4th intercostal space, right sternal border?

    Answer: V1

    V1 is placed at the 4th intercostal space along the right sternal border, directly to the right of the sternum.

  7. A QRS complex wider than 0.12 seconds most commonly indicates:

    Answer: Bundle branch block or ventricular origin

    A wide QRS (≥0.12 s or 3 small boxes) indicates delayed ventricular conduction, as seen in bundle branch blocks or beats originating in the ventricles.