[ECG changes in persons representing present-day professions]

Subject of the study are the two up-to-date professions with well expressed neuropsychic stress and hypodynamia: 19 managers from industry and 41 controllers from the railway transport. Both professional groups were subject to a definite dose of physical loading and estimation of the ECG changes by the aid of Minnesota's code (WHO 1968) and its modification by the Swedish Cardiological Association. Relatively high percents of positive working samples for healthy middle-aged men were found, which could be related with considerable occupational risk in both professions.