PMID: 16642670Apr 29, 2006Paper

Secular rhythms and Halberg's paraseasonality in the time occurrence of cerebral stroke

Bratislavské lekárske listy
M Kovac, M Sn Mikulecky

Abstract

To obtain the optimal information concerning the time course of the morbidity od cerebral stroke. Recently, long years' cycling, similar to that in sun and geomagnetic activity, is observed in various biomedical variables. Other discovery is that of transyear (over one year) and cisyear (under one year) rhythms,originating also in the sun, in medicine. There were 6100 patients with cerebral infarction, 415 with intracerebral and 277 with subarachnoid hemorrhage admitted at Clinic of Neurology in Nové Zámky (area with 70 km radius and 180 000 inhabitants). Their monthly numbers were registered since January 1989 up to December 2004. The data were processed by Halberg's cosinor regression. Presence of linear trend and of the period lengths of 10.5 (solar Schwabe-cycle), 5.25, 7.04 (geomagnetic activity cycling), 3.52, 1.70, 1.50, 1.30 (solar wind cycling), 1.20, 1.00 and 0.50 years was tested. Level of statistical significance was set at alpha = 0.05. In all three time series, significant linear trends were found with the estimated monthly increase by 0.8% of the estimated starting mesor value for infarction, 1.2% for cerebral and 1.9% for subarachnoid hemorrhage. Both the solar and geomagnetic cycling with their second harmonics...Continue Reading

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