Evolución clínica de pacientes con síndrome de Brugada y desfibriladores automáticos implantados. Experiencia en dos centros de atención terciaria.
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Introducción: El desfibrilador automático implantable es opción terapéutica en pacientes de alto riesgo con síndrome de Brugada (SB). El objetivo fue describir la evolución clínica de una serie de pacientes con SB y desfibriladores implantados en dos centros de atención terciaria.
Métodos: Entre abril/1998 y noviembre/2019 se implantaron desfibriladores a 64 pacientes con SB. Se realizó seguimiento al mes, a los 3 meses y semestralmente.
Resultados: Diecinueve debutaron con muerte súbita cardiaca (MSC) abortada, 36 con síncopes y 9 estaban asintomáticos, edad media 43.8 años, 49 del sexo masculino. El 96.2% tenía electrocardiograma convexo espontáneo en al menos una derivación precordial derecha y 12 antecedentes familiares de MSC. Se realizó estimulación eléctrica programada a 52, 12 fueron inducibles. Catorce presentaron complicaciones relacionadas con el sistema electrodo/generador y 19 tuvieron choques inadecuados. Dos pacientes tomaron sulfato de quinidina desde el implante por arritmias auriculares y dos fallecieron en circunstancias no aclaradas, del resto, en un seguimiento medio de 120.5±74.8 meses, 17 (28.3%) tuvieron choques adecuados, 12 habían debutado con MSC y 5 con síncopes, los factores de riesgo para presentar arritmias ventriculares malignas fueron: sexo masculino, MSC abortada al debut, mayor seguimiento y choques inadecuados. La supervivencia (Kaplan Meier) fue inferior en sintomáticos versus asintomáticos (p=0,042), y en debutantes con MSC versus con síncope (p=0,0034).
Conclusiones: Los pacientes sintomáticos con SB son de alto riesgo. Las complicaciones a largo plazo relacionadas con los desfibriladores automáticos implantados son trascendentes. La decisión de implantar desfibriladores a pacientes asintomáticos continúa siendo un desafío clínico.
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