Asystole - Course # 315-11


  • This dysrhythmia occurs when there is a total absence of electrical activity in the heart.
  • The patient is clinically dead.
  • Sometimes this tracing is referred to as straight line or flat line.
  • There will be an absence of P waves and QRS complexes.
  • True Asystole is an absolute medical emergency.
  • (Follow your local reporting and treatment protocols)
  • If your patient is speaking to you, they are NOT in Asystole. Check your attachments and equipment.
asystole tracing

Practice Strip

  • Analyze this tracing using the five steps of rhythm analysis.
  • Compare your answers with the answers on the next slide.
ventricular ecg image 121


  • Rhythm: Absent
  • Rate: 0
  • P Wave: absent
  • PR interval: n/a
  • QRS: absent
  • Interpretation: Asystole
ventricular ecg image 121

315 Asystole - Course # 315-11