Variabilidad de la frecuencia cardíaca: fisiomarcador cardioautónomo longitudinal en el síndrome de hipoventilación central congénita
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Joely R Gendler1,2, Amy Zhou3,4, Casey M Rand1,2
1Center for Autonomic Medicine in Pediatrics, Department of Pediatrics, Ann & Robert H Lurie Children's Hospital of Chicago, IL, United States.
Annals of the American Thoracic Society
|February 21, 2026
Resumen
Los pacientes con síndrome de hipoventilación central congénita (CCHS) muestran un empeoramiento de la función cardíaca autónoma con la edad y la gravedad de la variante PHOX2B. La variabilidad de la frecuencia cardíaca (VRC) puede servir como un biomarcador clave para la progresión de la ECCC y el riesgo cardiovascular.
Área de la Ciencia:
- Cardiología Cardiología.
- Genética La genética.
- Neurociencia Autónoma y Neurociencia Autónoma.
Sus antecedentes:
- El Síndrome Congénito de Hipoventilación Central (CCHS, por sus siglas en inglés) es un trastorno genético raro causado por variantes del gen PHOX2B.
- CCHS conduce a una desregulación autónoma cardíaca significativa, aumentando el riesgo de muerte súbita.
- La interacción entre la edad, el genotipo PHOX2B y la disfunción autónoma en CCHS no se comprende bien, y se necesitan biomarcadores específicos.
Objetivo del estudio:
- Investigar el impacto longitudinal de la edad y la gravedad del genotipo PHOX2B en la variabilidad de la frecuencia cardíaca (VRC) en pacientes con EHCC.
- Evaluar la VRC como un potencial biomarcador no invasivo para la función cardiovascular autónoma en el SCCC.
Principales métodos:
- Se recogieron datos longitudinales de electrocardiografía durante la noche durante la polisomnografía de individuos de CCHS con ventilación artificial.
- Categorizó las variantes de PHOX2B en grupos moderados y severos basados en datos clínicos, celulares e in silico.
- Empleó modelos lineales de efectos mixtos para analizar los cambios en la VRC en relación con la edad y la gravedad de la variante PHOX2B.
Principales resultados:
- Se analizaron 226 registros de 52 pacientes con CCHS.
- Se encontró que la gravedad de la variante PHOX2B se correlacionó con la reducción del tono vagal, la actividad de barorreflejo y la VRC general.
- Se observó que el aumento de la edad se asoció con una disminución de la actividad parasimpática y del barorreflejo, junto con un mayor dominio simpático.
Conclusiones:
- La edad avanzada en CCHS está relacionada con la abstinencia parasimpática y el aumento de la influencia simpática en el control cardíaco.
- La disminución de la sensibilidad al barorreflejo con la edad puede contribuir a la dominación simpática, lo que explica el aumento del riesgo cardiovascular.
- La relación establecida entre la severidad de la PHOX2B, la edad y la VRC pone de relieve el potencial de la VRC como un fisiomarcador sensible para la progresión de la ECCC y el riesgo cardioautónomo.
Palabras clave:
El CCHS es el CCHS.El HRV es el HRV.La desregulación autónoma de la desregulación autónomaLa función autónoma cardíaca es la función autónoma cardíaca.el riesgo cardiovascular.Más Videos Relacionados
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