Is Left Ventricular Systolic Dysfunction Associated With Increased Mortality Among Patients With Sepsis and Septic Shock?

BACKGROUND

The impact of left ventricular (LV) systolic function on outcomes in patients with sepsis and septic shock remains uncertain. The association, if any, may be nonlinear.

RESEARCH QUESTION: Is LV systolic dysfunction associated with increased mortality among patients with sepsis and septic shock?

STUDY DESIGN AND

METHODS

Retrospective cohort study comprising all adult patients admitted to the medical ICU from January 1, 2011, through December 31, 2020, with sepsis and septic shock as defined by the Third International Consensus Definitions for Sepsis and Septic Shock guidelines. All adult patients with sepsis or septic shock who underwent transthoracic echocardiography within 3 days from admission to the medical ICU were included. We divided patients into five groups based on LV ejection fraction (LVEF). In addition to univariate analysis, we also performed multivariate logistic regression analysis adjusting for patients' baseline characteristics and severity of illness. The primary outcome was the association between each classification of LVEF and in-hospital mortality.

RESULTS

A total of 3,151 patients were included in this study (LVEF < 25%, 133 patients; 25% ≤ LVEF < 40%, 305 patients; 40% ≤ LVEF < 55%, 568 patients; 55% ≤ LVEF < 70%, 1,792 patients; and LVEF ≥ 70%, 353 patients). In-hospital mortalities in each LVEF category were 51.1%, 34.8%, 26.6%, 26.2%, and 41.9%, respectively. In the multivariate logistic regression analysis, LVEF of < 25% (OR, 2.75; 95% CI, 1.82-4.17; P < .001) and LVEF of ≥ 70% (OR, 1.70; 95% CI, 1.09-1.88; P = .010) were associated independently with significantly higher in-hospital mortality compared with the reference LVEF category of 55% to 70%.

INTERPRETATION: The association of LVEF to in-hospital mortality in sepsis and septic shock was U-shaped. Both severe LV systolic dysfunction (LVEF < 25%) and hyperdynamic LVEF (LVEF ≥ 70%) were associated independently with significantly higher in-hospital mortality.