Key result
Focal atrial fibrillation can present in the origin of atrial tachycardia, with organized flutter rhythms mostly confined far from the atrial fibrillation origins.
Case Report
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The preferential origin of atrial tachycardia (AT) is generally associated with specific anatomical atrial structures such as crista terminalis, tricuspid annulus, mitral annulus, and pulmonary veins.1 There are 3 major mechanisms of focal AT: enhanced automaticity, triggered activity, and microreentry. Focal AT can be eliminated via radiofrequency ablation with fairly good long-term outcomes.2 In previous reports,3–5 atrial fibrillation (AF) with pseudo–atrial flutter had been presented; in those cases, the organized flutter rhythms were mostly confined far from AF origins.
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Lin et al. (2015) conducted a case report in Focal atrial fibrillation and atrial tachycardia. Focal atrial fibrillation can present in the origin of atrial tachycardia, with organized flutter rhythms mostly confined far from the atrial fibrillation origins.
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