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April 22, 2025Journal of Cardiothoracic and Vascular AnesthesiaOpen Access

Mixed Venous Oxygen Saturation Has a Poor Association with Cardiac Index during Early Intensive Care Unit Stay after Cardiac Surgery

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Why the study?

The study was conducted to assess the association between mixed venous oxygen saturation and cardiac index in cardiac surgical patients during the initial 4 hours in the ICU.

Population

4,958 adult cardiac surgical patients operated on during 2007 to 2020

Comparison

SvO2 vs cardiac index measurements

Design

Single-center retrospective observational study

Follow-up

4 hours

Authors

PHPetteri HolmJKJaana KarhuTETiina Erkinaro

Discussion

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Overview

SvO2 should not surrogate CI changes early after cardiac surgery; this Level 3 cohort leaves open optimal monitoring strategies.

Structured PICO

P
Population
4,958 adult cardiac surgical patients operated on during 2007 to 2020
I
Intervention
Pulmonary artery catheter (PAC) measurements of mixed venous oxygen saturation (SvO2) and cardiac index (CI) at ICU admission and 4 hours later
O
Outcome
Association between mixed venous oxygen saturation (SvO2) and cardiac index (CI)surrogate

Mixed venous oxygen saturation has a poor association with cardiac index during the early ICU recovery phase after cardiac surgery, indicating they should not be relied upon as reliable predictors of one another.

Cite This Study

Holm et al. (2025) studied this question.

synapsesocial.com/papers/6a1095d6e1a472cb5efd2bbbhttps://doi.org/10.1053/j.jvca.2025.04.030
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