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The clinical and electrocardiographic phenotype of patients with genotype-negative long QT syndrome.

Heart rhythm - 1 Oct 2025

Karlinski Vizentin Vanessa, Neves Raquel, Bains Sahej, Ferreira Felix Iuri, Tester David J, Bos J Martijn, Giudicessi John R, Ackerman Michael J

Abstract excerpt

BACKGROUND: Long QT syndrome (LQTS) is a genetic heart disease that increases the risk of ventricular arrhythmias and sudden cardia arrest. Despite advances in genetic testing, a small subset of patients with LQTS remain genetically elusive. OBJECTIVE: This study aimed to determine the prevalence and clinical characteristics of patients with a phenotype of LQTS but without a genotype. METHODS: This study aimed to...

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PMID: 40449819
DOI: 10.1016/j.hrthm.2025.05.053

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