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Background: Black patients have a lower incidence of atrial arrhythmias both atrial fibrillation (AF) and atrial flutter (AFL) despite having the same or a greater number of traditional risk factors. The incidence of atrial fibrillation after cavotricuspid isthmus (CTI) ablation in patients with typical flutter is markedly increased approaching 40% in some studies. It is unknown if Blacks specifically have a similar increased rate of AF after CTI ablation for typical flutter.
Methods: The electronic medical records of CTI ablations performed for typical AFL were retrospectively reviewed from July of 2010 to June of 2014 at a single, urban, tertiary-care, academic hospital. Clinical variables were retrieved from the EMR. AF was documented on ECG or at clinical follow up. Follow up was obtained through December of 2014. Patients were self-identified as Black or Non-Black.
Results: The records of a total of 201 patients – 51 Black (25.4%) and 150 non-Black (74.6%) – who underwent CTI ablation for typical atrial flutter were examined. Average age was similar (67.8 vs 66.3). There was a preponderance of men (77.6% vs 23.5%). There was a significantly lower rate of development of AF post CTI ablation for typical AFL in Blacks vs non-Blacks (22.2% vs 46.6%, p < 0.01). Additionally, women were more likely to develop AF (53.1% vs 36.2%, p < 0.05).
Conclusions: Black patients had a significantly lower incidence of AF after CTI ablation for typical AFL compared to non-Blacks.
Poster Hall, Hall C
Saturday, March 18, 2017, 3:45 p.m.-4:30 p.m.
Session Title: Arrhythmias and Clinical EP: AF Miscellaneous and Surgical Issues
Abstract Category: 6. Arrhythmias and Clinical EP: Other
Presentation Number: 1236-089
- 2017 American College of Cardiology Foundation