Tachyarrhythmias
Fast heart rhythms on an ECG may be caused by supraventricular or ventricular rhythms, some of which are imminently life threatening and require rapid assessment.
Narrow Complex Tachycardia
- Approach to Narrow Complex Tachycardia
Sinus Tachycardia
Regular narrow complex tachycardia with uniform P waves and PR intervals
Focal Atrial Tachycardia
Regular narrow complex tachycardia with abnormal yet consistent P waves
Multifocal Atrial Tachycardia
Irregular narrow complex tachycardia with multiple P wave morphologies and variable PP intervals
Atrial Flutter
Regular narrow complex tachycardia with sawtooth waves
Atrial Fibrillation
Irregular narrow complex tachycardia with absence of P waves and disorganised atrial activity
AV Nodal Reentrant Tachycardia
Regular narrow complex tachycardia with P waves hidden within QRS
AV Reentrant Tachycardia
Orthodromic or antidromic
Regular narrow complex tachycardia with P waves visible after QRS (orthodromic)
Wide Complex Tachycardia
- Causes of wide complex tachycardia
- Distinguishing VT and SVT with aberrancy
Monomorphic Ventricular Tachycardia
Regular tachycardia with broad QRS
Polymorphic Ventricular Tachycardia
Multiple ventricular ectopic morphologies
SVT with Aberrancy or Preexcitation
Regular tachycardia with broad QRS complexes
AF with Aberrancy or Preexcitation
Irregular tachycardia with broad QRS complexes