Arrhythmias - Differential Diagnosis Algorithm
Bradyarrhythmia (<60 bpm)
• Sinus Bradycardia
• Sick Sinus Syndrome
• SA Block
• AV Block (ISt/2nd /3rd degree)
• Junctional Escape Rhythm
• Ventricular Escape Rhythm
Abnormal Beats
• Premature atrial contraction
• Premature ventricular contraction
Tachyarrhythmias (>100 bpm)
- Narrow Complex - Regular Rhythm SVT (constant R-R Interval)
• Sinus Tachycardia
• Monofocal Ectopic Atrial Tachycardia
• Aflutter
• AVNRT
• AVRT (ie. WPW)
- Narrow Complex - Irregular Rhythm SVT (variable R-R interval)
• AFib
• AFIutter with Variable AV Conduction
• Multifocal Atrial Tachycardia
- Wide Complex - Regular Rhythm (constant R-R Interval)
• Monomorphic VT
• Regular rhythm SVT with conduction aberrancy
- Wide Complex - Irregular Rhythm (variable R-R interval)
• Polymorphic VT (including Tosades de Pointes if in a setting of long QT)
• Irregular rhythm SVT with conduction aberrancy
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