{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T20:43:14Z","timestamp":1790455394761,"version":"4.1.0"},"reference-count":31,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,5,11]],"date-time":"2021-05-11T00:00:00Z","timestamp":1620691200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81700383"],"award-info":[{"award-number":["81700383"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Cardiovasc. Med."],"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> We investigated the effect of particulate matter with aerodynamic diameter &amp;lt;2.5 \u03bcm (PM2.5) and meteorological conditions on the risk of emergency room visits in patients with atrial fibrillation (AF) in Beijing, which is considered as a monsoon climate region.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> In this case-crossover design study, medical records from patients with AF who visited the Critical Care Center in the Emergency Department of Anzhen Hospital from January 2011 through December 2014 and air quality and meteorological data of Beijing during the same period were collected and analyzed using Cox regression and time-series autocorrelation analyses.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> A total of 8,241 patients were included. When the average PM2.5 concentration was &amp;gt;430 \u03bcg\/m<jats:sup>3<\/jats:sup>, the risk of emergency room visits for patients with uncomplicated AF, AF combined with cardiac insufficiency, and AF combined with rheumatic heart disease increased by 12, 12, and 40%, respectively. When the average PM2.5 concentration was &amp;gt;420 \u03bcg\/m<jats:sup>3<\/jats:sup>, patients with AF combined with diabetes mellitus had a 75% increased risk of emergency room visits, which was the largest increase in risk among all types of patients with AF. When the average PM2.5 concentration was &amp;gt;390 \u03bcg\/m<jats:sup>3<\/jats:sup>, patients with AF combined with acute coronary syndrome had an approximately 30% increased risk of emergency room visits, which was the highest and fastest increase in risk among all types of patients with AF. The risk of emergency room visits for patients with AF was positively correlated with air quality as the time lag proceeded, with an autocorrelation coefficient of 0.223 between the risk of emergency room visits and air quality in patients with AF on day 6 of the time lag.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> Exposure to certain concentrations of PM2.5 in a monsoon climate region significantly increased the risk of emergency room visits in patients with AF.<\/jats:p>","DOI":"10.3389\/fcvm.2021.672745","type":"journal-article","created":{"date-parts":[[2021,5,11]],"date-time":"2021-05-11T04:14:10Z","timestamp":1620706450000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["Effect of Air Quality on the Risk of Emergency Room Visits in Patients With Atrial 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