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Updated: Aug 4, 2026
06:01
A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
¿Está la incidencia del accidente cerebrovascular relacionada con la estación o la temperatura? El proyecto de
P M Rothwell1, S J Wroe, J Slattery
1Department of Clinical Neurosciences, Western General Hospital, Edinburgh, UK.
Lancet (London, England)
|April 6, 1996
Resumen
El estudio no encontró variaciones estacionales significativas en la incidencia de accidente cerebrovascular. Sin embargo, el riesgo de hemorragia intracerebral primaria aumentó en climas fríos, lo que sugiere que la temperatura, no la estación, afecta el riesgo de accidente cerebrovascular.
Área de la Ciencia:
- Neurología Neurología.
- Epidemiología La epidemiología.
- Salud Ambiental Salud del medio ambiente.
Sus antecedentes:
- Estudios previos sugieren un aumento invernal en la incidencia de ictus isquémico.
- Se han propuesto explicaciones fisiopatológicas para las variaciones estacionales en el ictus.
- Este estudio investiga la incidencia del ictus en relación con la estación y la temperatura ambiente.
Objetivo del estudio:
- Para determinar si la incidencia del accidente cerebrovascular varía significativamente según la temporada.
- Examinar la relación entre la temperatura ambiente y la incidencia de diferentes tipos de accidentes cerebrovasculares.
Principales métodos:
- Un estudio de cohorte basado en la comunidad de los primeros accidentes cerebrovasculares en aproximadamente 105.000 personas.
- Los datos se recopilaron durante cuatro años, con 675 accidentes cerebrovasculares registrados.
- Análisis del mes de inicio del accidente cerebrovascular estratificado por tipo de accidente cerebrovascular: infarto cerebral, hemorragia intracerebral primaria y hemorragia subaracnoidea.
Principales resultados:
- No se observó ninguna variación estacional estadísticamente significativa en la incidencia general de accidente cerebrovascular.
- Un aumento notable en la incidencia de hemorragia intracerebral primaria se produjo durante los períodos de baja temperatura ambiente.
- No se encontró una correlación significativa entre la temperatura y la incidencia de accidente cerebrovascular isquémico o hemorragia subaracnoidea.
Conclusiones:
- El exceso de invierno comúnmente reportado de accidentes cerebrovasculares isquémicos podría ser un artefacto.
- Los sesgos potenciales incluyen patrones de derivación en estudios hospitalarios y el aumento de las tasas de mortalidad invernal.
- La temperatura, particularmente las bajas temperaturas, pueden influir en la incidencia de tipos específicos de ictus como la hemorragia intracerebral primaria.
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