ArticleJACC. Case reports2026
Alternating Bundle Branch Block Despite a Patent Stent in Late-Presenting Extensive Anterior STEMI.
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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4 authors.
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Abstract
backgroundAlternating bundle branch block (ABBB) is a rare but high-risk marker of advanced infra-Hisian disease and impending high-grade atrioventricular (AV) block in anterior ST-segment elevation myocardial infarction (STEMI). CASE SUMMARY: A 39-year-old male smoker presented 19 hours after chest pain onset with extensive anterior STEMI and ABBB. Ostial left anterior descending artery occlusion was treated with overlapping drug-eluting stents, achieving TIMI flow grade III. Despite patent stents, he developed delayed complete AV block. Temporary transvenous pacing restored hemodynamic stability, and AV conduction recovered within 24 hours. DISCUSSION: Septal injury, edema, microvascular obstruction, or reperfusion injury can destabilize His-Purkinje conduction despite the presence of open epicardial arteries. TAKE-HOME MESSAGE: ABBB warrants continuous monitoring and pacing readiness, even when angiography appears reassuring.
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