EKG Waveform Lesson

Definition of Dysrhythmia

A cardiac dysrhythmia is an abnormal heart beat: the rhythm may be irregular in its pacing or the heart rate may be low or high. Some dysrhythmias are potentially life threatening while other dysrhythmias (such as sinus arrhythmia) and normal.

Dysrhythmia Categories

  • Tachycardia, which is a fast heart rhythm.
    • Atrial dysrhythmias, such as include:
      • Atrial fibrillation
      • Atrial flutter
      • Paroxysmal Supraventricular tachycardia
      • Wolff-Parkinson-White syndrome
      Ventricular dysrhythmias, including:
      • Premature ventricular contractions
      • Ventricular fibrillation
  • Bradycardia, a slow heart rhythm.
    • Bradyarrhythmias include:
      • Heart Conduction Block
      • Sick Sinus Syndrome
      • Sinus bradycardia
  • A premature beat.

Dysrhythmia Diagnosis

This website contains a number of free training tools:
  • Introduction Course
  • Interative Presentations
  • EKG Interpretation Quizzes

Getting Started

A good starting point for learning cardiac arrhythmias is our EKG Basics training course.

EKG Waveforms »