[Climatologic parameters and risk of acute vascular, neurologic and cardiac incidents]

In order to discover a possible correlation between climatic parameters and the occurrence of acute neurological vascular accidents (thrombosis, hemorrhages) and of cardiac accidents (myocardial infarction), the data of a meteorological card-index including climatological parameters [atmospheric pressure in millibars, temperature of the air under shelter in degrees Celsius, relative humidity, speed and direction of the winds, hydrometeors and electrometeors) as well as parameters of solar and ionospheric activity (daily flare index (DFI), index of the geomagnetic activity (AA), daily planetary index (AP), phases of the moon] were compared. The study concerned a period of 731 days and the parameters, subdivided into classes and gradients, were compared with the admission to hospital of 535 patients with myocardial infarction and of 378 patients with stroke. The statistical study consisted in searching for correlations between the parameters considered two by two and in applying the method of the factorial analysis of correspondence for a more extensive analysis. The frequency of the vascular accidents increased when the temperature of the air was less than 12 degrees, when there was hoar-frost with fog, rain or snow and when the DFI was less than 530. The factorial analysis of correspondence enabled to consider 3 fields in which correlations were suggestive for 3 distinct affections: myocardial infarction, cerebral hemorrhages and cerebral thrombo-embolisms.