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EKG Lead Placement & Rhythm Recognition Flashcards

6 cards from real PCT 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. In a standard 12-lead EKG, where is the V1 electrode placed?

    Answer: Right side, 4th intercostal space at the sternal border

    V1 is placed at the 4th intercostal space at the right sternal border, serving as the first precordial lead.

  2. What does a prolonged PR interval on an EKG tracing indicate?

    Answer: A first-degree AV block

    A PR interval longer than 0.20 seconds indicates delayed conduction through the AV node, which defines a first-degree AV block.

  3. Which EKG rhythm shows irregularly irregular R-R intervals with no identifiable P waves?

    Answer: Atrial fibrillation

    Atrial fibrillation is characterized by chaotic atrial activity producing no distinct P waves and completely irregular ventricular response.

  4. What is the correct color code for the right arm (RA) limb lead electrode?

    Answer: White

    In the standard American color code, white is placed on the right arm (remember: 'white is right').

  5. A patient's EKG shows a heart rate of 42 bpm with a regular rhythm and wide QRS complexes. This is MOST consistent with:

    Answer: Ventricular escape rhythm

    A rate of 20-40 bpm with wide QRS complexes indicates the ventricular pacemaker cells have taken over, producing a ventricular escape rhythm.

  6. Artifact on an EKG tracing can be caused by all of the following EXCEPT:

    Answer: Proper skin preparation

    Proper skin preparation (cleaning and light abrasion) reduces artifact by improving electrode contact, while all other options introduce artifact.