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EKG Technician Daily Question

Past questions

Try each one first, then tap to see the answer and the explanation.

Question 1 · EKG Analysis and Interpretation

Which method is most accurate for calculating the rate of a regular rhythm?

  • A. Count the QRS complexes in a 6-second strip and multiply by ten
  • B. Guess based on how the complexes look
  • C. Count the small boxes between two R waves and divide 1,500 by that number
  • D. Count the P waves in one large box
Show the answer
C. Count the small boxes between two R waves and divide 1,500 by that number

The small box method uses the finest grid units, so it is the most precise.

Question 2 · EKG Analysis and Interpretation

Which rhythm has a rate of 40 to 60, a narrow QRS, and inverted P waves in lead II?

  • A. Sinus bradycardia, which has upright P waves in lead II
  • B. Idioventricular rhythm
  • C. Atrial flutter
  • D. Junctional rhythm
Show the answer
D. Junctional rhythm

The AV junction fires at 40 to 60, and retrograde conduction inverts the P waves.

Question 3 · EKG Analysis and Interpretation

Which rhythm normally speeds up with inhalation and slows with exhalation?

  • A. Sinus arrhythmia
  • B. Atrial fibrillation, which is irregular at all times
  • C. Ventricular tachycardia
  • D. Third-degree block
Show the answer
A. Sinus arrhythmia

Sinus arrhythmia varies with breathing and is common in young, healthy people.

Question 4 · EKG Analysis and Interpretation

Which rhythm finding is a hallmark of atrial flutter?

  • A. An atrial rate of about 60 with normal P waves that each lead to a QRS
  • B. No atrial activity at all
  • C. An atrial rate of about 300 with sawtooth waves
  • D. Wide QRS complexes in every beat
Show the answer
C. An atrial rate of about 300 with sawtooth waves

Flutter waves typically fire near 300 per minute in a sawtooth pattern.

Question 5 · EKG Analysis and Interpretation

Which rhythm is chaotic, with no identifiable waves, and causes the patient to have no pulse?

  • A. Ventricular fibrillation
  • B. Atrial flutter, which shows sawtooth waves
  • C. Sinus bradycardia
  • D. First-degree block
Show the answer
A. Ventricular fibrillation

VF is chaotic ventricular activity with no effective heartbeat and requires immediate defibrillation.

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