Figure 1. Left ventricular ejection fraction (LVEF) at baseline and discharge of patients with ST‐segment–elevation myocardial infarction of March 2019 and March 2020.

Data are expressed as median and interquartile range (IQR). The baseline and discharge median and IQR of LVEF in March 2019 was 42% (IQR, 37%–47%) and 48% (IQR, 42%–55%), respectively. The baseline and discharge median and IQR of LVEF in March 2020 was 35% (IQR, 32.5%–42.5%) and 35% (IQR, 35%–40%), respectively. The median of delta (∆) between baseline and discharge LVEF in patients of 2019 is 5 (IQR, 0–8); and in patients of 2020, 0 (IQR, 0–2.5). The difference was 3 (95% CI, 0–5; P=0.011).