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A comparison Research on the Hearing Loss and the Changing of Cardiac Function in the Workers Exposed to Noise

Wang Tiejun,et al  
The hearing and cardiac function of 69 workers exposed to the same noise level were examined. The results showed that, in the groupof hearing loss, PEP and ICT were longer,the ratio PEP/LVET was higher, the rate ofabnormality of cardiac systolic function ratiowas higher, and EF (angiographic left ventri-cular ejection fraction) was lower than thosein normal hearing group. The changes betwe-en the two groups are found to be statisticallysignificant difference. Those results suggest that hearing damagecaused by noise is parallel to changes in car-diac function due to noise.
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