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Venous congestion is a possible mechanism leading to acute kidney injury (AKI) following cardiac surgery. Portal vein flow pulsatility is an echographic marker of cardiogenic portal hypertension and might identify clinically significant organ congestion. This exploratory study aims to assess if the presence of portal flow pulsatility measured by transthoracic echography in the postsurgical intensive care unit is associated with AKI after cardiac surgery.

Retrospective cohort study.

Specialized care university hospital.

Patients who underwent cardiac surgery between May 2015 and February 2016 and had at least 1 Doppler assessment of portal flow performed by the attending critical care physician during the week following cardiac surgery.

The association between portal flow pulsatility defined as a pulsatility fraction ≥50% and the risk of subsequent AKI was assessed using …