Student learning toolCreated by: Champsedine Arevalo, MAN, RN, EMT
Block

2nd Degree AV Block, Mobitz II

Constant PR with sudden dropped QRS. High risk of progressing to complete block.

LEAD II · 25 mm/sMobitz II

Characteristics

PR interval
Constant
Conduction
Intermittently dropped QRS (e.g., 3:2, 4:3)

Common causes

  • Anterior MI
  • Infranodal conduction disease

ACLS treatment

  1. 1Transcutaneous pacing; prepare for transvenous pacing. Atropine often ineffective.

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