Key result
Electrophysiologic mapping confirmed Mahaim fiber tachycardia, which was successfully treated with radiofrequency ablation.
Case Report (n=1)
Mahaim fiber tachycardia is a rare cause of wide complex tachycardia in adolescents that can be successfully diagnosed with electrophysiologic mapping and treated with radiofrequency ablation.
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Supports mapping and ablation for rare adolescent Mahaim fiber tachycardia; leaves open need for larger studies before broader adoption.
Mahaim fiber tachycardia is an uncommon cause of palpitations among the pediatric population. This case report describes an adolescent female who presented with recurrent episodes of tachycardia with chest pain and dizziness. Her ECG showed tachycardia with wide QRS complexes and left bundle branch block pattern. Repeat ECG after adenosine treatment revealed sinus rhythm with persistence of the left bundle branch block pattern. Metoprolol was started however she continued to have episodes of sustained tachycardia.Electrophysiologic study then confirmed the diagnosis of Mahaim fiber tachycardia. Treatment was successful with mapping of the accessory pathways followed by radiofrequency ablation.
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Mata et al. (2011) conducted a case report in Mahaim fiber tachycardia (n=1). Radiofrequency ablation was evaluated on Resolution of tachycardia. Electrophysiologic mapping confirmed Mahaim fiber tachycardia, which was successfully treated with radiofrequency ablation.
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