Sudden death from ischemic heart disease in ontario.

摘要: It is possible that there a systematic geographical variation in the proportion of deaths from ischemic heart disease occur suddenly, and this may be causally related to water hardness or some other environmental factor. Three indices sudden death have been examined; each showed correlation with was similar sign magnitude. A detailed examination 1686 occurring residents two cities which differ widely their supply confirmed ascribed higher (by 20-30%) northern (soft-water) city than southern (hard-water) city.