Objective To explore the abnormalities in ECG of the workers exposed to noise in a diesel engine factory.
Methods The environment noise levels in different work places were detected and physical examination of 336 noise-exposed workers were performed in a Diesel engine factory. Their ECG abnormalities were also analyzed. Another 293 non noise-exposed workers in the same factory were selected as the control group.
Results The abnormal rate of ECG in the exposed group were significantly higher than those in the control group (P < 0.01).ECG abnormalities are mainly manifested as sinus bradycardia, sinus arrhythmia, ST-T abnormality and fascicular block. The abnormal rates of ECG in the exposed group in every work-age group were higher than those of the control group. The abnormal rate of ECG was most obvious in the initial period, and not increased when work-age increased.
Conclusion The exposure of noise might have certain impact on cardiovascular system.
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