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Pediatric ECG Considerations 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. What electrode placement modification is used for small infants when standard chest electrode spacing is too large?

    Answer: Use pediatric (smaller) electrode pads and reposition to fit the chest

    Pediatric-sized electrode pads are used on small infants and repositioned proportionally across the smaller chest wall to maintain anatomically correct lead placement.

  2. Which ECG finding is characteristic of right ventricular hypertrophy (RVH) in a 3-year-old?

    Answer: Tall R wave in lead V1 with R/S ratio > 1

    A tall R wave in V1 with an R/S ratio greater than 1 is the hallmark of right ventricular hypertrophy in children, reflecting right ventricular dominance or pathological RV enlargement.

  3. A 7-year-old's ECG shows a QRS axis of +110 degrees. How should this be interpreted?

    Answer: Right axis deviation, potentially abnormal at this age

    By age 7, the QRS axis should fall between 0° and +90°; an axis of +110° represents right axis deviation and may indicate right ventricular hypertrophy or other pathology.

  4. The ECG of a child with Down syndrome and an atrioventricular septal defect (AVSD) typically shows:

    Answer: Right bundle branch block and left axis deviation

    AVSD classically produces left axis deviation (often superior axis, -30° to -90°) along with right bundle branch block due to the abnormal conduction through the defective AV junction.

  5. When measuring the QT interval in a child with a heart rate of 120 bpm, which formula corrects for heart rate?

    Answer: QTc = QT / √RR (Bazett's formula)

    Bazett's formula (QTc = QT ÷ √RR) is the most widely used method to correct the QT interval for heart rate, though it tends to overcorrect at very fast rates common in children.

  6. A child's ECG shows delta waves, a short PR interval, and wide QRS complexes. This pattern indicates:

    Answer: Wolff-Parkinson-White (WPW) syndrome

    WPW syndrome is characterized by ventricular pre-excitation via an accessory pathway, producing a delta wave, shortened PR interval, and widened QRS on the ECG.

  7. In pediatric ECG interpretation, T-wave inversion in leads V1–V3 in a 5-year-old is considered:

    Answer: Normal persistent juvenile T-wave pattern

    Persistent T-wave inversions in V1–V3 (juvenile T-wave pattern) are normal in children and may persist into adolescence, particularly in females, and do not indicate ischemia.