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Intra-atrial block after COVID-19 vaccination-induced fulminant myocarditis: a case report.

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November 2024

Division of Cardiology, Saiseikai Kumamoto Hospital, 5-3-1 Chikami, Minami-ku, Kumamoto 861-4193, Japan.

Background: Myocarditis is associated with an increased risk of conduction disturbances during the acute phase, which recovers in most cases but rarely recurs during the chronic phase.

Case Summary: A 50-year-old man who developed fulminant myocarditis after COVID-19 mRNA vaccination was discharged 24 days after admission. He was readmitted for heart failure associated with two P waves: one P wave (P1) had a normal amplitude and was dissociated from the QRS, and the other (P2) had a very low amplitude and was associated with the QRS.

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September 2024

Department of Cardiology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts. Electronic address:

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Background: Cardiac sarcoidosis though in itself, a rare entity, very rarely presents primarily with conduction abnormalities as the primary manifestation in the spectrum of presentations accounted by this chronic granulomatous systemic disease. Sarcoidosis presenting as intra-atrial masses is virtually unheard of.

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: Ebstein anomaly (EA) is a rare congenital heart disease characterized by the apical displacement of the tricuspid leaflets, creating an enlarged functional right atrium. Supraventricular arrhythmias (SVA) are common, and catheter ablation remains challenging. SVA is considered a risk factor for sudden cardiac death in this population.

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