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ECG Waveform Measurements and Intervals Flashcards

6 cards from real CRAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 ECG Waveform Measurements and Intervals flashcards as text

  1. In the 6-second strip method for calculating heart rate, you count the number of QRS complexes and:

    Answer: Multiply by 10

    In the 6-second method, counting QRS complexes in a 6-second strip and multiplying by 10 gives beats per minute.

  2. A notched or bifid P wave (P mitrale) is associated with:

    Answer: Left atrial enlargement

    A wide, notched P wave (P mitrale) indicates left atrial enlargement, often seen in mitral valve disease.

  3. What does the TP segment of the ECG represent?

    Answer: The true isoelectric baseline during diastole

    The TP segment, occurring between the end of the T wave and the start of the next P wave, represents the true isoelectric baseline during diastole.

  4. Tall, peaked T waves on an ECG are classically associated with:

    Answer: Hyperkalemia

    Hyperkalemia causes tall, peaked (tent-shaped) T waves, and as potassium rises further, it can cause widened QRS and eventual sine-wave pattern.

  5. The J point on the ECG is defined as:

    Answer: The junction between the QRS complex and ST segment

    The J point is the junction where the QRS complex ends and the ST segment begins, and is the reference point for measuring ST elevation or depression.

  6. A prominent U wave following the T wave is most commonly associated with:

    Answer: Hypokalemia

    A prominent U wave is classically associated with hypokalemia, and can also be seen with certain medications such as digoxin.

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