WANDERING  PACEMAKER
 
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  • R-R interval is irregular
  • R-R interval varies continuously
  • P-P interval is irregular
  • P wave axis continously changes (sinus,  atrial,  junctional)
  • QRS complexes are related to all P waves
  • PR interval may vary by up to 0.04 sec

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  • Premature atrial contraction
  • Supraventricular tachycardia
  • Tachycardia-bradycardia ("sick sinus") syndrome
  • Sinus arrhythmia