ArticleJACC. Case reports2026
The Not-So-Fast Tachycardia: A Paradoxical Rhythm Leading to Cardiomyopathy.
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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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Authors and funding
5 authors.
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Abstract
case summaryAn 88-year-old man with baseline sinus bradycardia and bifascicular block developed an incessant rhythm at 97 to 98 beats/min without discernible P waves and QRS morphology identical to baseline. Holter monitoring confirmed marked rate invariance. Echocardiography revealed new left ventricular systolic dysfunction (left ventricular ejection fraction 35%-40%; previously normal). Electrophysiology study demonstrated very slow typical (slow-fast) atrioventricular nodal re-entry tachycardia; slow-pathway ablation restored sinus rhythm, and left ventricular ejection fraction normalized within 3 months. TAKE-HOME MESSAGES: A near-100 beats/min junctional-appearing rhythm may represent atrioventricular nodal-dependent reentry. When incessant and associated with new cardiomyopathy, electrophysiology study can diagnose the mechanism and enable curative ablation.
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