Abstract:

[Abstract] Objective   To explore the influence of seasonal variations on acute cerebral infarction outcome.Meth?
ods   We collected data from acute cerebral infarction patients in the Second Hospital of Tianjin Medical University from January2009to February 2012. All cases were classified by months and seasons into different groups to analyze the season?al variations retrospectively.Results   (1) The percentage of good outcome of acute cerebral infarction show significant dif?ference between each month （P<0.01）. The percentage of good outcome was highest in August （92.1%）, lowest in Decem?ber（78.1%）, second lowest in April（81.9%）. The percentage of good outcome in summer （91.6%）was higher than spring（87.2%）, autumn （86.4%）and winter（83.9%）（P<0.05）. (2) Among those patients converted to bad outcome more pa?tients was attacked by cerebrovascular accident in winter （68.3%）than in summer （43.2%）, and more patients was combinedwith a pulmonary infection in winter（69.5%）than in summer （48.6%）and in autumn（49.3%）（P<0.05）. (3) Seasonal effect in acute cerebral infarction outcome was obvious in those ≥65years of age（P<0.05）. Conclusion   Seasonal changes are associated with the outcome and severity of acute cerebral infarction

Key words: brain infarction, acute disease, season rhythm, treatment outcome, Tianjin