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:
Atrioventricular Arrhythmias include:
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:
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