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为评价锰对接触工人心血管功能的影响，本文对６５６名锰作业工人和１５４名对照工人的心电图和血压进行了调查。结果显示，作业场所空气中ＭｎＯ２浓度几何均值为０．１３ｍｇ／ｍ~３（０．１０～０．９７ｍｇ／ｍ~３），样品超标率３８．７％。接触组低舒张压检出率（７．６％）明显高于对照组（１．３％，Ｐ＜０．００５），ＯＲ值为６．３（９５％ＣＩ１．５～２６．１）；其舒张压均值明显低于对照组（Ｐ＜０．０５）。接触组不同接锰工龄、年龄的低舒张压检出率有显著性差异（Ｐ＜０．０２５～０．０１０），有随接锰工龄及年龄增长而降低的趋势；２０岁～年龄段接锰工人低舒张压检出率明显高于对照工人（Ｐ＜０．００５），ＯＲ＝１０．８，９５％ＣＩ１．５～８０．１）；接锰女工低舒张压检出率明显高于男工（Ｐ＜０．０１，ＯＲ＝２．３，９５％ＣＩ１．２～４．４）。本调查表明，锰有降低舒张压作用，且以青工，女工更为敏感。
To assess the impact of manganese on cardiovascular function in exposed workers, the electrocardiogram and blood pressure of 656 manganese workers and 154 control workers were investigated. The results showed that the geometric mean concentration of MnO2 in the workplace was 0.13 mg / m ~ 3 (0.10 ~ 0.97 mg / m ~ 3), and the sample exceeded the standard rate by 38.7%. The detection rate of low diastolic blood pressure in the contact group (7.6%) was significantly higher than that in the control group (1.3%, P <0.005). The odds ratio was 6.3 (95% CI 1.5-26.1). The mean diastolic pressure was significantly lower than that of the control group (P <0.05). There were significant differences in the detection rate of low diastolic blood pressure between the two groups (P <0.025 ~ 0.010), with the different working age and the age of the patients in the contact group; The detection rate of low diastolic blood pressure in manganese workers was significantly higher than that in control workers (P <0.005), OR = 10.8,95% CI1.5 ~ 80.1). The detection rate of low diastolic blood pressure in manganese workers was significantly higher than that of control workers Male workers (P <0.01, OR = 2.3, 95% CI 1.2 ~ 4.4). This survey shows that manganese has a reduced diastolic blood pressure, and is more sensitive to young workers and female workers.