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Seasonal (circannual) periodicity of spontaneous intracerebral hemorrhage in minnesota
Author(s) -
RamirezLassepas Manuel,
Haus Erhard,
Lakatua David J.,
Sackett Linda,
Swoyer Jackie
Publication year - 1980
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410080512
Subject(s) - circannual rhythm , pathological , intracerebral hemorrhage , medicine , daylight , spontaneous intracerebral hemorrhage , subarachnoid hemorrhage , circadian rhythm , demography , pediatrics , physics , sociology , optics
Abstract Seasonal periodicity in the onset of spontaneous intracerebral hemorrhage was studied in 118 consecutive cases occurring during a six‐year span. The patients were urban residents of eastern Minnesota, a region characterized by wide seasonal fluctuations in daylight and temperature. The greatest number of cases consistently occurred each year during January and February. Circsianual (about one year) periodicity was demonstrated by statistical analysis using rhythmometric techniques. This periodicity coincided with that reported for mortality from cerebrovascular and cardiovascular diseases in the United States and elsewhere. Available information suggests that in populations at high risk for vascular diseases, climatic conditions might act as synchronizers to endogenous rhythms influencing the periodic occurrence of pathological vascular events.

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