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Atrial macroreentrant tachycardia is a common arrhythmia following catheter interventional and surgical ablation of atrial fibrillation (AF).An accurate understanding of the anatomic location of the reentrant pathway is crucial for curative ablation of the arrhythmia.Currently, sequential activation mapping supported by three-dimensional (3D) electroanatomic mapping systems is widely used to reconstruct the 3D spread of electrical activation throughout cardiac chamber anatomies.