ArticleArquivos brasileiros de cardiologia2024
Deceptive Anteroseptal ST-segment Elevation and Brugada Pattern Caused by Isolated Conus Artery Occlusion.
Article in Arquivos brasileiros de cardiologia, 2024. 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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Abstract
The conus artery (CA) supplies the right ventricular outflow tract (RVOT). ST-segment elevation in leads V1-3, which can resemble Brugada electrocardiogram (EKG) patterns, has been reported due to occlusion of the CA. A 68-year-old male was admitted to the hospital with a diagnosis of non-ST-elevation myocardial infarction. A coronary angiogram revealed a dissection in the conus artery, most likely caused by the catheter. Due to the small caliber of the CA, medical therapy was chosen as the course of action. However, after the procedure, an EKG showed changes consistent with features of both type-1 and type-2 Brugada patterns, with ST-segment elevations in leads V1-4. Subsequent coronary imaging revealed that the CA had progressed to total occlusion. Despite multiple attempts to gain reentry into the true lumen, they were unsuccessful. Based on the risk-benefit ratio, the decision was made to continue with medical therapy. This is the first reported case of CA occlusion induced by catheter dissection, which manifested as anteroseptal ST-segment elevation. The patient did not report any anginal symptoms or arrhythmic events, which contrasts with conventional knowledge. Not all CA obstructions or RVOT infarcts cause Brugada-like patterns. When they do, ST elevations tend to be less than those in true Brugada syndrome.
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