ectopic atrial tachycardia
Abnormal heart rhythm originating from an atrial focus outside the sinoatrial node, typically at rates of 150-250 bpm.
Full Definition
Ectopic atrial tachycardia (EAT) is an arrhythmia characterized by rapid, regular atrial activation arising from an abnormal focus within the atria but outside the sinoatrial node. The ectopic focus generates impulses at rates typically between 150-250 beats per minute, faster than the normal sinus node. EAT can be either automatic (due to enhanced automaticity of atrial tissue) or triggered (due to delayed afterdepolarizations). It may present as sustained or non-sustained episodes and can lead to tachycardia-induced cardiomyopathy if persistent. Treatment options include antiarrhythmic medications, catheter ablation, or rate control measures.
Usage
Usage note: Can be abbreviated as EAT in clinical contexts.
In Context
- "The patient developed ectopic atrial tachycardia with a cycle length of 280 ms during electrophysiology study." — EP procedure report
- "Catheter ablation successfully eliminated the ectopic atrial tachycardia focus in the right atrial appendage." — Ablation procedure note