Atrial Arrhythmias

Atrial Arrhythmias, also referred to supraventricular arrhythmias, is classified as an arrhythmia that begins in the upper chambers of the heart and is often a rapid, irregular heartbeat.

About Atrial Arrhythmias

An atrial arrhythmia is an abnormal heart rhythm that starts within the atria, either the Left Atria (LA) or the Right Atria (RA) and also includes arrhythmias originating from the Atrioventricular node (AV node). It may be characterised by rapid heart rates, often faster than 100 beats per minute (BPM). The term “Supraventricular Tachycardia” may be applied to this cluster of arrhythmias, as they originate within the Atria.


Atrial Arrhythmias include:

  • Atrial Fibrillation
  • Atrial Flutter
  • Atrial Tachycardia
  • Sinus Tachycardia


Atrioventricular Arrhythmias include:

  • Atrioventricular nodal re-entrant tachycardia
  • Atrioventricular re-entrant tachycardia.1


All atrial arrhythmias may present with rapid heart rates of > 100 bpm and can be regular or irregular in nature. Most will be characterised by a narrow complex rhythm (in the absence of other cardiac / conduction disease). While most atrial arrhythmias are not fatal, they may lead to complications that can cause significant health issues, such as blood clots in atrial fibrillation which may lead to stroke. 


Many Atrial arrhythmias can produce symptoms such as:

  • Shortness of breath,
  • Chest pain,
  • Palpitations,
  • Hypotension (low blood pressure),
  • Syncope and dizziness.2


To learn more about Atrial Arrhythmias, click the links below:

Atrial Fibrillation

Atrial Flutter

Atrioventricular Nodal Re-entrant Tachycardia

Wolff-Parkinson-White Syndrome



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