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September 10, 2025Open Access

Feasibility of Estimating Cardiac Indices Using Cardiac Surgery Anesthesia Records in a Multicenter Cohort

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Analysis evaluates cardiac index accuracy in cardiac surgery using anesthesia records, indicating further research needs.

The study found that adjusted estimates of cardiac index can be generated accurately in cardiac surgery patients, though with limited individual classification.
Using thermodilution measurements, the median cardiac index values were 2.1 L/min/m2 before and 2.4 L/min/m2 after bypass surgery.
Analysis of 5,989 patients revealed that the best formula estimated mean absolute errors of 0.45 and 0.47 L/min/m2 for pre- and post-bypass respectively.
The findings suggest that while routine data can inform population-level cardiac index estimates, predicting individual low cardiac index remains a challenge.

Balczewski et al. (2025) studied this question.

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