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Cardiac Subspecialty Certification (CSC) Exam

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What is a Wenckebach AV block?

  1. A delay in the conduction of the impulse through the AV junction
  2. Increasingly difficult AV node conduction showing a P wave not followed by a QRS complex on EKG
  3. A delayed AV conduction at the bundle braches
  4. No conduction of impulse from the atria to the ventricles
Explanation

Answer: B - A Wenckebach AV block, also called a Mobitz I block, is when increasingly difficult AV node conduction shows a P wave not followed by a QRS complex on EKG. This is considered a second-degree AV block.

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