Key result
Peak frequency mapping over an open-window map successfully guides right-sided accessory pathway ablation.
Case Report (n=1)
No
Combining peak frequency mapping with open-window mapping enhances visualization of the atrioventricular annulus and can aid in the successful ablation of challenging accessory pathways.
May aid tricuspid annulus visualization during right-sided accessory pathway ablation; leaves open need for prospective validation.
Accessory pathways (APs) are connections that directly establish electrical conduction between the atrial and ventricular myocardium. APs can have antegrade and/or retrograde conduction, sometimes leading to atrioventricular reentrant tachycardia (AVRT). When atrial fibrillation (AF) coexists, it can result in pseudo-ventricular tachycardia (VT), which is known to be potentially life-threatening(1). Therefore, an electrophysiological study is recommended in patients with accessory pathways(1). Catheter ablation is an effective treatment for APs.
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Matsumoto et al. (2025) conducted a case report in Right-sided accessory pathway / Atrioventricular reentrant tachycardia (n=1). Peak frequency map overlaid onto open-window mapping (Emphasis map) was evaluated on Successful ablation of the accessory pathway. Overlaying a peak frequency map onto an open-window map successfully visualized the tricuspid annulus and guided effective catheter ablation of a right-sided accessory pathway.
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