Sunday 13 November 2016

Sinus Tachycardia

Sinus tachycardia (also colloquially known as sinus tach or sinus tachy) is a sinus rhythm with an elevated rate of impulses, defined as a rate greater than 100 beats/min (bpm) in an average adult. The normal resting heart rate in the average adult ranges from 60–100 beats/min. Note that the normal heart rate varies with age, with infants having normal heart rate of 110–150 bpm, in contrast to the elderly, who have slower normal.

ECG characteristics:

  • Rate: Greater than or equal to 100.
  • Rhythm: Regular.
  • P waves: Upright, consistent, and normal in morphology (if no atrial disease)
  • P–R interval: Between 0.12–0.20 seconds and shortens with increasing heart rate
  • QRS complex: Less than 0.12 seconds, consistent, and normal in morphology.

ECG strip example of sinus tachycardia

ECG strip example of sinus tachycardia





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