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Post‐operative myocardial dysfunction does not affect the physiological response to early mobilization after coronary artery bypass grafting

Background:  An acute increase in oxygen demand can be compensated for either by increased cardiac index (CI) or increased oxygen extraction, resulting in reduced mixed venous oxygen saturation (SvO2). We tested the hypothesis that post‐operative cardiac dysfunction may explain why oxygen extraction alone is increased during early mobilization after cardiac surgery.