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EKG and Electrocardiography Flashcards

7 cards from real RMA 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 and Electrocardiography flashcards as text

  1. Which lead is the standard rhythm strip lead because it usually shows clear, upright P waves and QRS complexes?

    Answer: Lead II

    Lead II runs parallel to the heart's electrical axis, producing clear upright deflections ideal for rhythm analysis.

  2. On standard EKG paper, how much time does one small (1 mm) horizontal box represent?

    Answer: 0.04 second

    At a paper speed of 25 mm/sec, each small box equals 0.04 second.

  3. A patient's skin is oily and the electrodes keep losing contact. What should the RMA do first?

    Answer: Cleanse the site with alcohol and let it dry

    Cleansing oily skin with alcohol removes residue so electrodes adhere and conduct properly.

  4. Which EKG artifact appears as a thick, fuzzy baseline caused by nearby electrical equipment?

    Answer: 60-cycle (AC) interference

    60-cycle interference comes from alternating current sources and shows as a uniform fuzzy baseline.

  5. The chest lead V1 is correctly placed at which location?

    Answer: Fourth intercostal space, right sternal border

    V1 is positioned in the fourth intercostal space just to the right of the sternum.

  6. What does the P wave on an EKG represent?

    Answer: Atrial depolarization

    The P wave reflects depolarization of the atria as the impulse spreads from the SA node.

  7. A wandering baseline that drifts up and down is most often caused by what?

    Answer: Patient movement or respiration

    Patient movement and breathing shift the baseline, producing a slow wavering drift.