ACLS: Bradycardia

Revision as of 14:52, 11 July 2015 by Kxl328 (talk | contribs) (Treatment)

This page is for bradycardia with a pulse; for bradycardia without a pulse see Adult Pulseless Arrest (i.e. PEA)


  • Only intervene if pt is symptomatic (hypotension, AMS, chest pain, pulm edema)


  • Sinus node dysfunction
  • AV node dysfunction
    • 1st degree AV block
    • 2nd degree AV block Mobitz I/Wenckebach
    • 2nd degree AV block Mobitz II
    • 3rd degree AV block (complete heart block)



  1. Atropine
    • Can be used as temporizing measure (while awaiting pacing and/or chronotropes)
    • Use cautiously in patients with ongoing ischemia (tachycardia may worsen ischemia)
    • 0.5mg q3-5min (max 3mg or 6 doses)
      • May not work in 2nd/3rd degree heart block, heart transplant
      • Priority is to use external cardiac pacemaking
      • Block is below AV node so atropine will accelerate sinus rate, leading to worsening of block and increased fatigue of AV nodal cells
  2. Chronotropes
  3. Transcutaneous Pacing
  4. Transvenous Pacing

Antidotes for toxicologic causes

See Also