Fig. 1From: Evaluation of β-blocker therapy for long-term outcomes in patients with low ejection fraction after cardiac surgeryKaplan Meier survival curves of the entire study cohort, with 95% confidence intervals (CI), showed that β-blocker was associated with a higher unadjusted mortality (86, 95%CI:82–90% vs. 62, 95%CI: 54–70%, P < 0.001). 14 patients who died suddenly after the operation were not includedBack to article page