Examination of fluctuations in atmospheric pressure related to XXXX .

@entity1 @entity2795 @entity5330 @entity2704 @entity10
BACKGROUND: Japan has four seasons and many chances of low atmospheric pressure or approaches of typhoon, therefore it has been empirically known that the fluctuation of weather induces @entity2704 in @entity1 . Generally, its mechanism has been interpreted as follows: physical loading, attributed by atmospheric pressure to @entity1 bodies, compresses or dilates @entity1 blood vessels, which leads to abnormality in blood flow and induces @entity2704 . We report our examination of the stage in which @entity2704 tends to be induced focusing on the variation of atmospheric pressure. FINDINGS: Subjects were 34 @entity1 with @entity2704 , who were treated in our hospital. The @entity1 included 31 females and three males, whose mean age was 32      6.7. 22 @entity1 had @entity2795 and 12 @entity1 had @entity5330 . All of @entity1 with @entity2704 maintained a @entity10 diary to record atmospheric pressures when they developed a @entity2704 . The standard atmospheric pressure was defined as 1013  hPa, and with this value as the criterion, we investigated slight fluctuations in the atmospheric pressure when they developed a @entity2704 . It was found that the atmospheric pressure when the @entity1 developed a @entity2704 was within 1003-1007  hPa in the approach of low atmospheric pressure and that the @entity1 developed a @entity2704 when the atmospheric pressure decreased by 6-10  hPa, slightly less than the standard atmospheric pressure. CONCLUSION: Small decreases of 6-10  hPa relative to the standard atmospheric pressure of 1013  hPa induced @entity2704 attacks most frequently in @entity1 with @entity2704 .
