Mortality study of the significance of extrasystoles in an insured population.
D000328:Adult; D005117:Cardiac Complexes, Premature / Q000401:mortality*; D004562:Electrocardiography; D006801:Humans; D008017:Life Expectancy; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology; D013610:Tachycardia / Q000453:epidemiology; D014693:Ventricular Fibrillation / Q000453:epidemiology