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Length of stay stratified by (A) frontal QRS-T angle 1–50, 51–100, and 101–180°; (B) Frontal QRST risk score. Length of stay was significantly higher among patients with (A) frontal QRS-T angle >100° compared with those ≤ 100° and those with a (B) frontal QRST risk score ≥ 4 points.
