Key result
Prior left atrial ablation in patients with CTI-dependent atrial flutter was associated with atypical upright flutter waves in the inferior leads compared to controls (60% vs 0%; P<0.001).
Why the study?
Does prior left atrial ablation for atrial fibrillation alter the ECG and mapping characteristics of subsequent CTI-dependent atrial flutter?
Case-Control (n=45)
Does prior left atrial ablation for atrial fibrillation alter the ECG and mapping characteristics of subsequent CTI-dependent atrial flutter?
Absolute Event Rate: 60% vs 0%
p-value: p=<0.001
CTI-dependent atrial flutter occurring after left atrial ablation for AF often presents with atypical ECG features (upright inferior flutter waves) due to altered LA activation, necessitating entrainment mapping at the CTI.
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Clinicians should suspect prior LA ablation with atypical flutter waves and confirm CTI dependence via entrainment; extends ECG characterization of post-ablation flutter but leaves open management impact.
Chugh et al. (2006) conducted a case-control in Cavotricuspid isthmus-dependent atrial flutter (n=45). Prior left atrial ablation of atrial fibrillation vs. No prior left atrial ablation was evaluated on Upright flutter waves in the inferior leads (p=<0.001). Prior left atrial ablation in patients with CTI-dependent atrial flutter was associated with atypical upright flutter waves in the inferior leads compared to controls (60% vs 0%; P<0.001).
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