https://www.youtube.com/watch?v=6r86BZc8D9k

Criteria

• Tachycardia (>100 bpm)
  • 140-200 bpm
  • Extremely regular
• Narrow QRS
• Non-discernible P wave

  • Pseudo-s in II, III, aVF

    

  • Pseudo-r in v1, v2

    

Etiology

• PAC → Re-entry