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  • Title: Cardiac arrhythmia in women performing heavy physical work.
    Author: Bortkiewicz A, Pałczyński C, Makowiec-Dabrowska T, Górski P.
    Journal: Int J Occup Med Environ Health; 1995; 8(1):23-31. PubMed ID: 7640907.
    Abstract:
    The objective of this work was to determine the response of the circulatory system to heavy physical work (the average energy expenditure was about 5000 kJ/shift). The tests were performed on a group of 35 women aged between 24 and 50 years, employed at a printing office as printing machine operators. The average length of employment for the group was 17 years (3-28 years). A 24-hour Holter ECG recording was taken on these women with the aid of an Oxford Medilog 3000 system. Before and after each recording, the arterial blood pressure was measured. Based on the ECG recordings, the heart rates during work, leisure time and sleep were calculated and the morphologies of the recordings were evaluated. In the group investigated, the abnormality in 24-hour ECG recordings classified as pathology, were found in 9 women within this group. Frequent ventricular premature beats (ExV) occurred in 3 women, ventricular bigeminy in 1 women, and single R/T excitations in 1 women. Frequent premature supraventricular extrasystols (ExSV) were found in 4 women, and within this number, in 1 woman both those heart rhythm disturbances were found. The heart rhythm disturbances occurred in connection with the performed physical task. Sinusal pauses were found in 2 women and A-V Mobitz II block was found in 1 women within the group investigated. Those changes occurred at night. No resting ECG changes were observed. The high frequency of occurrence of pathological changes in the group investigated indicates that the careful control of the state of the circulatory system in people performing heavy physical work is required.
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