Key result
CTI ablation terminates typical atrial flutter, unmasking a rare epicardial right atrial-coronary sinus connection.
Why the study?
Clinical electrophysiological observations of epicardial connections between the low right atrium and coronary sinus musculature in humans are rare, and mechanisms of coronary sinus electrogram changes after cavotricuspid isthmus ablation remain unclear.
Case Report (n=1)
No
This case clearly demonstrates a rare clinical observation of a low right atrium-to-coronary sinus epicardial connection elucidated by EGM analysis during and after typical atrial flutter ablation.
Typical atrial flutter was terminated and sinus rhythm was restored. We discussed the mechanism of changes in the coronary sinus atrial electrograms.
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Nakamura et al. (2026) conducted a case report in Typical Atrial Flutter (n=1). Cavotricuspid isthmus (CTI) linear ablation was evaluated on Termination of atrial flutter and restoration of sinus rhythm. Cavotricuspid isthmus ablation terminated typical atrial flutter and restored sinus rhythm, revealing a rare epicardial connection between the right atrium and coronary sinus musculature.
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