AV junctional rhythm

Introduction

Cardiac rhythm initiated from spontaneous depolarization from with in AV node.

Etiology

• myocardial ischemia or infarction
• hypokalemia
• AV node blocking agents
  • digitalis toxicity
  • beta-blockers
  • Ca+2 channel blockers

Clinical manifestations

depend upon rate & underlying condition

Diagnostic procedures

• electrocardiogram:
  • narrow complex
  • regular rhythm @ 30-60/min
  • p-waves may be present (PR interval < 0.12 sec), absent or retrograde

Management

• correction of underlying etiology
• cardiac pacing
  • temporary if unstable
  • permanent pacing may be necessary

More general terms

• supraventricular arrhythmia

More specific terms

• AV junctional tachycardia