Cardiovascular: MI, Heart Failure, Arrhythmias · USMLE Step 1

A woman presents with palpitations. ECG shows sawtooth flutter waves. Which arrhythmia is this?

  1. Atrial flutter
  2. Atrial fibrillation
  3. Ventricular flutter
  4. AV block
Show answer and explanation

Correct answer: Atrial flutter

Atrial flutter produces characteristic sawtooth flutter waves due to a reentrant circuit in the atria.

Difficulty: Medium Question 17 of 20

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