Mobitz II (Second-Degree Atrioventricular Block)


Risk

  • Occurs after anterior infarction and can quickly proceed to third-degree heart block

Perioperative Risks

  • Risk of developing third-degree block

Worry About

  • Rapid development into third-degree block, which requires temporary transvenous pacing

Overview

  • Unlike Mobitz I block, Mobitz II block is located in bundle of His or bundle branches, resulting in lengthening QRS duration.

  • PP and RR intervals are constant, and PR intervals are constant prior to the dropped QRS complex.

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