空気の粒子汚染の増加と心筋梗塞の引き金となる
A Peters1, D W Dockery, J E Muller
1Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA.
Circulation
|June 13, 2001
まとめ
細粒子の空気汚染は心臓発作 (心筋梗塞または心筋梗塞) を引き起こす可能性があります. 症状が現れる前数時間または1日以内にPM2.5濃度の上昇に曝露すると,心筋梗塞のリスクが増加します.
科学分野:
- 環境衛生 環境衛生 環境衛生
- 心血管伝染病学 心血管伝染病学
- 大気汚染に関する研究
背景:
- 周囲の微粒子の空気汚染は,心血管疾患の入院と関連しています.
- 高い環境粒子の濃度と急性心筋梗塞 (MI) の発症の間の特定の関連は,以前は知られていなかった.
研究 の 目的:
- 環境中の細粒子の濃度の上昇が急性心筋梗塞 (MI) の発症を誘発するかどうかを調査する.
主な方法:
- 大ボストン地区で772人の心筋梗塞の患者を対象としたケース・クロスオーバー研究.
- 細粒子物質 (PM2.5),炭黒,気体汚染物質の1時間の濃度測定.
- ケースクロスオーバーのアプローチを使用して,MI発症前の2時間および24時間のウィンドウ内のトリガリング効果を評価するためにデータを分析しました.
主要な成果:
- PM2.5濃度の上昇は,2時間以内に心筋梗塞の発症のリスクの増加と関連していました.
- 遅延した関連が観察され,24時間の平均PM2.5曝露と関連したMIリスクの増加が,症状の発症の1日前に観察されました.
- 多変量分析は,短期 (2時間) と遅延 (24時間) の PM2.5 曝露の両方において,有意な確率比を示した.
結論:
- 高濃度の細粒子の大気汚染は,一時的に心筋梗塞のリスクを増やす可能性があります.
- 研究結果は,大気汚染が潜在的に予防可能な心筋梗塞の引き金であることを示唆しています.
- これらの発見を確認するために,さまざまな場所でさらなる研究が必要である.
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