Successful localization and ablation of a Mahaim potential using a high-resolution mapping catheter after a failed conventional ablation attempt
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Mahaim fibers are a rare sub-type of right-sided accessory pathways with exclusively antegrade decremental conduction properties. Since the ventricular insertion of the pathway is often located within the Purkinje system of the right ventricle, Mahaim tachycardia is typically characterized by wide complexes of left bundle branch block morphology. Successful ablation is generally performed by targeting characteristic (His-like) Mahaim potentials located at the lateral tricuspid anulus [1, 2]. However, the exact localization of these subtle pathway signals along the tricuspid anulus can be challenging and remains unsuccessful in a relevant number of cases. High-resolution multi-electrode mapping catheters are increasingly applied for improving the mapping resolution within areas of low-voltage . We tested the hypothesis that a multi-electrode high-resolution mapping catheter (PentaRay™, Biosense Webster, Diamond Bar, CA) might help localizing the Mahaim potential in a patient...
- 7.Kosiuk J, Lindemann F, Hindricks G, Bollmann A (2016) Termination of the left atrial tachycardia by the ablation of epicardial critical isthmus visualized with a novel high-resolution mapping system. Clin Res Cardiol 105:1049–1050. https://doi.org/10.1007/s00392-016-1030-9 CrossRefPubMedGoogle Scholar