Fig. 1From: Short-term effects of fine particulate matter and ozone on the cardiac conduction system in patients undergoing cardiac catheterizationPercent change (95% CI) of the geometric mean of ECG parameters per interquartile range increase in PM2.5 and O3 in distributed-lag models. CI confidence interval, ECG electrocardiogram, PM2.5 particulate matter ≤ 2.5 μm in aerodynamic diameter, O3 ozone QTc heart rate-corrected QT interval, GM geometric mean, IQR interquartile rangeBack to article page