Key result
Radiofrequency ablation successfully treated an atypical atrial flutter involving the base of the right atrium by creating a linear lesion at the subeustachian isthmus.
Case Report (n=1)
Mapping of the inferior vena cava region and demonstration of concealed entrainment are essential for establishing the mechanism and successfully ablating atypical atrial flutter involving the base of the right atrium.
May guide ablation strategy in select atypical RA flutter cases; leaves open confirmation beyond single-case evidence.
Subeustachian isthmus-dependent typical atrial flutter has been well studied. We demonstrate a case with atypical atrial flutter involving only the base of the right atrium around the inferior vena cava. Entrainment pacing and mapping studies documented a distinct circuit traversing the subeustachian isthmus, propagating through the posterobasal right atrium, and skirting the inferior vena cava. Successful radiofrequency ablation of the arrhythmia was accomplished by creating a linear lesion at the subeustachian isthmus. Mapping of the inferior vena cava region and the demonstration of concealed entrainment are essential steps in establishing the mechanism of the atypical atrial flutter.
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Chang et al. (2000) conducted a case report in Atypical atrial flutter (n=1). Radiofrequency ablation was evaluated on Successful ablation of the arrhythmia. Radiofrequency ablation successfully treated an atypical atrial flutter involving the base of the right atrium by creating a linear lesion at the subeustachian isthmus.
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