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Boxplot of (A) SAI QRST, (B) spatial QRS-T angle, (C) SVG magnitude, (D) sqrt-SVG azimuth, (E) Cornell product, (F) QRS duration, (G) QTc interval, (H) sqrt-SVG elevation at each study visit (1–5) in participants with and without abnormal LVEF, measured at visit 5.
