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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. What does the QRS complex represent on an EKG tracing?

    Answer: Ventricular depolarization

    The QRS complex reflects rapid depolarization of the ventricles.

  2. The standard paper speed for a routine 12-lead EKG is:

    Answer: 25 mm/second

    Routine EKGs run at 25 mm/second, the basis for standard time measurements.

  3. Where should the left leg (LL) limb electrode be placed?

    Answer: Lower left leg or ankle

    The LL electrode is placed on the lower left leg, typically at the ankle.

  4. A standardization mark on an EKG that is 10 mm tall confirms what?

    Answer: Proper voltage calibration (1 mV = 10 mm)

    A 10 mm standardization mark verifies that 1 millivolt produces a 10 mm deflection.

  5. The brief flat segment between atrial and ventricular depolarization that allows ventricular filling is the:

    Answer: PR segment

    The PR segment reflects the delay at the AV node before ventricular activation.

  6. Somatic tremor artifact on an EKG is best reduced by:

    Answer: Helping the patient relax and stay warm and still

    Somatic tremor comes from muscle activity, so relaxing and warming the patient minimizes it.

  7. Which structure is the heart's normal primary pacemaker?

    Answer: Sinoatrial (SA) node

    The SA node sets the normal heart rate by initiating each electrical impulse.