Abstract：
Little is known about the impacts of specific chemical components on cardiovascular hospitalizations. We examined the relationships of PM2.5 chemical composition and daily hospitalizations for cardiovascular disease in 184 Chinese cities. Acute PM2.5 chemical composition exposures were linked to higher cardiovascular disease hospitalizations on the same day and the percentage change of cardiovascular admission was the highest at 1.76% (95% CI, 1.36-2.16%) per interquartile range increase in BC, followed by 1.07% (0.72-1.43%) for SO42-, 1.04% (0.63-1.46%) for NH4+, 0.99% (0.55-1.43%) for NO3-, 0.83% (0.50-1.17%) for OM, and 0.80% (0.34%-1.26%) for Cl-. Similar findings were observed for all cause-specific major cardiovascular diseases, except for heart rhythm disturbances. Short-term exposures to PM2.5 chemical composition were related to higher admissions and showed diverse impacts on major cardiovascular diseases.
摘要：
关于特定化学成分对心血管住院的影响知之甚少。我们研究了184个中国城市的PM2.5化学成分与每日心血管疾病住院人数的关系。急性PM2.5化学成分暴露与同一天较高的心血管疾病住院率有关，并且心血管入院的百分比变化最高，为每四分位数范围增加1.76％（95％CI，1.36-2.16％），其次是SO42-1.07%(0.72-1.43%)，NH4+为1.04%（0.63-1.46%），NO3-为0.99%（0.55-1.43%），OM为0.83%（0.50-1.17%），和0.80%（0.34%-1.26%）的Cl-。对于所有特定原因的主要心血管疾病都观察到了类似的发现，除了心律紊乱.短期暴露于PM2.5化学成分与更高的入院率有关，并对主要心血管疾病显示出不同的影响。
