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Ｐ＜０．０１讨论调查历时四年，连续进行了三年心电图检查，于１９９３年发现观察组四种心电图异常改变明显高于对照组，均有显著差异。异常改变主要为不完全性右束支传导阻滞、窦性心动过缓、窦性心律不齐、Ｔ波改变。因此，《化工健康监护技术规定》中关于＂接触一氧化碳工人，不论年龄大小均应每年必检心电图＂的规定，对保护工人身体健康是有益的。
P <0.01 Discussion Surveying lasted four years, continuous three years of electrocardiogram examination in 1993 found that the observed group of four ECG abnormalities was significantly higher than the control group, were significantly different. Abnormal changes were mainly incomplete right bundle branch block, sinus bradycardia, sinus arrhythmia, T wave changes. Therefore, the “Technical Regulations on Chemical Health Care” on the “exposure to carbon monoxide workers regardless of age should be inspected every year,” the provisions of the ECG, to protect the health of workers is beneficial.