Effect of premorbid beta-blockers on cardiac function and clinical outcomes in septic patients: a retrospective study

Abstract

Background: Beta-blockers have been reported to exert potential beneficial effects in sepsis in recent years. However, their clinical application in sepsis remains limited due to concerns regarding hemodynamic impacts. This study aims to explore whether premorbid use of beta-blockers is associated with improvements in cardiac function and favorable clinical outcomes among patients with sepsis.
Methods: This single-center, retrospective cohort study was conducted in the Intensive Care Unit (ICU) of a university-affiliated hospital. All patients diagnosed with sepsis admitted between August 2022 and March 2024 were enrolled. Exclusion criteria included age < 18 years, hospitalization duration < 48 hours, a history of severe underlying cardiac conditions, and incomplete clinical records. Primary outcomes included myocardial injury markers, echocardiographic parameters, and electrocardiographic indices to assess cardiac function. Secondary outcome was mortality.
Results: Among 1005 septic patients, 228 had received premorbid beta-blockers. No significant difference in baseline disease severity was observed between the two groups. Patients with premorbid beta-blocker exposure had lower levels of cardiac troponin I (TnI, 87.9 [IQR, 23.4-306.0] vs 142.0 [IQR, 37.8-481.2]), lactic dehydrogenase (LDH, 274.0 [IQR, 175.0-496.0] vs 319.0 [IQR, 229.0-456.8]), and B-type natriuretic peptide (BNP, 267.9 [IQR, 118.1-1065.1] vs 509.3 [IQR, 184.8-1203.0]). Echocardiographic assessments revealed that premorbid beta-blockers were associated with a higher left ventricular ejection fraction (LVEF, 58% [IQR 52-60] vs 55% [IQR 50-60]). Additionally, premorbid beta-blockers were linked to lower 14-day (13.6% [IQR 9.1-18.1] vs 21.5% [IQR 18.6-24.4]), 28-day (17.5% [IQR 12.6-22.5] vs 27.4% [IQR 24.3-30.6]), and in-hospital (18.9% [IQR 13.7-24.0] vs 28.8% [IQR 25.6-32.0]) mortality rates. 
Conclusions: Among septic patients, premorbid beta-blockers are associated with preserved cardiac function and improved clinical outcomes. These findings highlight the need for prospective or randomized controlled trials to further explore the potential cardioprotective role of beta-blockers in sepsis.