All sectionsMidRotation Exam/ECG

ECGRead the rhythm.

Part of the Cardio station.

44 practice questionsOriginal booklet images

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4 examples to read together with the source

These examples contain conflicting, uncertain or already labelled answers, so they stay outside scored practice.

QUESTION 17

The source diagnosis says "probable hyperkalemia". Preserve this uncertainty; do not grade it as a definitive combined diagnosis.

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Left ventricular hypertrophy with probable hyperkalemia (tall peak T)

  • S V1 + R V6 > 35 mm (here it is 50).
  • Tall peaked T wave in V4 to V6.
  • There is also tall R in V5.
ECG Teaching Booklet, p. 21 (opens the original PDF)
QUESTION 27

The third source finding is incomplete: "wave in lead II, V4 to V6." The missing word has not been inferred.

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Sinus bradycardia

  • Heart rate—56/min.
  • P, QRS, T—normal.
  • wave in lead II, V4 to V6.
ECG Teaching Booklet, p. 31 (opens the original PDF)
QUESTION 41

The source finding refers to Mobitz II, while the diagnosis says "probably Mobitz type I". The source is internally inconsistent and uncertain; no definitive grading.

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A 2:1 AV block, probably Mobitz type I

  • normal narrow QRS; approximately 30% of Mobitz II exhibits a narrow QRS complex.
ECG Teaching Booklet, p. 48 (opens the original PDF)
QUESTION 45

The source has a diagnosis but no findings after "This ECG shows:". A complete findings rubric is unavailable; no findings have been invented.

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Ventricular tachycardia

    ECG Teaching Booklet, p. 52 (opens the original PDF)