SINUS  TACHYCARDIA
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  • R-R interval regular
  • QRS rate is increased
  • QRS rate < 230/min
  • P wave precedes each QRS complex
  • P wave axis is 0o-90o (with normal atrial situs)
  • P wave axis remains constant
  • PR interval is normal for child's age
  • PR interval remains constant

  • ¡ÒÃÇÔ¹Ô¨©ÑÂá¡âä
  • Supraventricular tachycardia