Why the study?
Does radiofrequency catheter ablation at a high-right atrial site eliminate isthmus-independent atrial flutter?
Does radiofrequency catheter ablation at a high-right atrial site eliminate isthmus-independent atrial flutter?
Radiofrequency catheter ablation targeting the high-right atrial site can successfully eliminate isthmus-independent atrial flutter.
High-right atrial ablation may eliminate isthmus-independent flutter; hypothesis-generating and requires prospective validation before practice change.
INTRODUCTION: We report the electrophysiologic study and radiofrequency catheter ablation of isthmus-independent atrial flutter in 2 patients. The isthmus-independent atrial flutter in these 2 patients had similar ECG and electrophysiologic findings. Both were reproducibly induced by rapid atrial pacing. The atrial activation sequence and entrainment study proved that these atrial flutters were not isthmus-dependent. A high-right atrial site was identified as the critical site of the slow conduction zone of the tachycardia in both. This site showed double potentials and mid-diastolic potentials. Radiofrequency catheter ablation at this site successfully eliminated the isthmus-independent atrial flutter in both patients.
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Lai et al. (1999) studied this question.
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