ArticleJACC. Case reports2026
Atrial Tachycardia and Bundle Branch Re-Entry Ventricular Tachycardia With Similar QRS Complex Morphology.
Article in JACC. Case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
backgroundWide-QRS-complex tachycardia with QRS complex morphology identical to sinus rhythm has been described in bundle branch re-entry ventricular tachycardia (BBR-VT). However, the coexistence of supraventricular and ventricular tachycardias with identical electrocardiographic (ECG) morphology has not been well described. CASE SUMMARY: A 56-year-old woman exhibited 2 sustained tachycardias with nearly identical right bundle branch block-type QRS complex morphology. One was atrial tachycardia (AT), and the other was malignant reverse-type BBR-VT, confirmed by invasive electrophysiology. Radiofrequency catheter ablation targeting the crista terminalis and coronary sinus eliminated AT, and radiofrequency ablation at the right bundle branch rendered BBR-VT noninducible. Despite similar ECG appearance, mechanisms, prognosis, and management differed significantly. DISCUSSION: AT and BBR-VT may share common features in ECG QRS complex indistinguishable from sinus rhythm in patients with advanced His-Purkinje conduction disease. TAKE-HOME MESSAGES: AT and malignant BBR-VT may coexist and produce nearly identical surface ECGs. Surface ECG QRS complex morphology alone may be misleading, and electrophysiologic evaluation is mandatory when wide-QRS-complex tachycardia occurs in patients with septal conduction disease.
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