Cardiothoracic & vascular anesthesia

Low cardiac index during periods of arterial hypotension and risk of acute kidney injury in cardiac surgery

Br J AnaesthPublished Retrospective cohort study

Main finding · AKI per 5-min joint hypotension/CI≤2Result — go to the resultAdjusted odds ratio 1.11 95% CI 1.02–1.22

Authors' conclusion

Joint exposure to hypotension/CI≤2 during cardiac surgery was associated with AKI and increased LOS, whereas exposure to hypotension/CI>2 was not.

Study context

Population
Adults undergoing coronary artery bypass surgery with CPB379 (30%) exposed to ≥5 min hypotension/low CI
Participants
1,272 adults
Exposure
Duration of joint hypotension with low CI vs other joint mean arterial pressure (MAP)/CI ranges
Outcome
AKI

Main finding

AKI per 5-min joint hypotension/CI≤2

Adjusted odds ratio

1.11

95% CI 1.02–1.22

P = 0.021

Hypotension/CI≤2 (per 5-min)
adjusted OR 1.11 (95% CI 1.02–1.22); P = 0.021

Per 5-min, as printed

As reported in the abstract

Observational data: associations, not effects.

Secondary outcomes

OutcomeAdjusted time ratio (95% CI)P value
ICU LOS1.04 (1.02–1.07)P = 0.002
Hospital LOS1.02 (1.00–1.03)P = 0.009

ICU length of stay (LOS)

Hypotension/CI>2 not associated with increased LOS

Original publication

Low cardiac index during periods of arterial hypotension and risk of acute kidney injury in cardiac surgery. Br J Anaesth. Published 6 May 2026. doi:10.1016/j.bja.2026.02.037

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