First-Degree Atrioventricular (AV) Block

First-Degree Atrioventricular (AV) Block - Flowchart First-Degree Atrioventricular Block First-Degree Atrioventricular Block

«Flowchart»

First-Degree AV Block

If PR is markedly prolonged, AV pacing may improve hemodynamics

Evaluate and Treat Causes

Asymptomatic

Asymptomatic Asymptomatic

Symptomatic

Symptomatic Symptomatic

Consider permanent PM for hemodynamic stabilization

End

Consider drugs used to treat MI (e.g., β-adrenergic blockers)

^*Possible exception: If PR is very long and believed to be hemodynamically compromising

^* * Possible exception:

No specific treatment unless:

SBE—r/o abscess
Watch for worsening AV block, if so temporary pacemaker

SBE—r/o abscess
SBE—r/o abscess

Rheumatic fever
Watch for worsening AV block

Rheumatic fever
Rheumatic fever

S/P AVR
Watch for worsening AV block

S/P AVR
S/P AVR

Acute MI
No therapy usually required^*

Acute MI
^* * Acute MI