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Arq. bras. cardiol ; 108(1): 70-73, Jan. 2017. graf
Article in English | LILACS | ID: biblio-1038528

ABSTRACT

Abstract Compound heterozygosity has been described in inherited arrhythmias, and usually associated with a more severe phenotype. Reports of this occurrence in Brugada syndrome patients are still rare. We report a study of genotype-phenotype correlation after the identification of new variants by genetic testing. We describe the case of an affected child with a combination of two different likely pathogenic SCN5A variants, presenting sinus node dysfunction, flutter and atrial fibrillation, prolonged HV interval, spontaneous type 1 Brugada pattern in the prepubescent age and familiar history of sudden death.


Resumo A heterozigose composta é descrita em arritmias hereditárias, geralmente associada a um fenótipo mais grave. Relatos dessa ocorrência em pacientes com síndrome de Brugada ainda são raros. Neste estudo, descrevemos o caso de uma criança com a combinação de duas novas variantes distintas no gene SCN5A, apresentando disfunção do nó sinusal, flutter e fibrilação atrial, intervalo HV prolongado, padrão tipo 1 espontâneo de Brugada na idade pré-puberal e história familiar de morte súbita.


Subject(s)
Humans , Male , Child, Preschool , Atrial Flutter/genetics , Brugada Syndrome/genetics , NAV1.5 Voltage-Gated Sodium Channel/genetics , Mutation , Pedigree , Phenotype , Atrial Flutter/physiopathology , Severity of Illness Index , Genetic Predisposition to Disease , Electrocardiography , Brugada Syndrome/physiopathology , Heterozygote
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