Spontaneous Mahaim Fiber Automaticity as a Rare Cause of PVC-Like Complexes

The case exemplifies the unusual electrophysiological property of this rare entity and uniquely illustrates Mahaim spontaneous automaticity masquerading as right ventricular apical ectopy.

Authors

Caleb Powell (ORCID: https://orcid.org/0000-0003-2218-5432)
Luke Byrne (ORCID: https://orcid.org/0000-0002-7389-4979)
Gerard J. Fahy
Katie Walsh

Institutions

Cork University Hospital (IE)

Publication Details

Journal: JACC Case Reports
Published: 2026-01-21
DOI: https://doi.org/10.1016/j.jaccas.2025.106665
Primary Topic: Cardiac Arrhythmias and Treatments
Type: article
Field-Weighted Citation Impact: 0.00

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article

Spontaneous Mahaim Fiber Automaticity as a Rare Cause of PVC-Like Complexes

Caleb Powell, Luke Byrne, Gerard J. Fahy, Katie Walsh

Jan 21, 2026

JACC Case Reports

Cardiac Arrhythmias and Treatments

article

Spontaneous Mahaim Fiber Automaticity as a Rare Cause of PVC-Like Complexes

Caleb Powell, Luke Byrne, Gerard J. Fahy, Katie Walsh

January 21, 2026article en

Abstract

The case exemplifies the unusual electrophysiological property of this rare entity and uniquely illustrates Mahaim spontaneous automaticity masquerading as right ventricular apical ectopy.

JACC Case ReportsVol. 31(8)

Cork University Hospital (IE)

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Cardiac Arrhythmias and Treatments

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Spontaneous Mahaim Fiber Automaticity as a Rare Cause of PVC-Like Complexes — Caleb Powell, Luke Byrne, et al. · JACC Case Reports (2026) | TGRS Research Map | TGRS