Walk Test IDs Risk of Cognitive Dysfunction Post Cardiac Surgery

Preoperative 6-minute walk distance linked to POCD risk in older adults undergoing cardiac surgery.
Preoperative 6-minute walk distance linked to POCD risk in older adults undergoing cardiac surgery.

HealthDay News — The 6-minute walk distance (6MWD) test is useful in identifying patients with a higher likelihood of developing postoperative cognitive dysfunction (POCD) following cardiac surgery, according to a study published online May 9 in the Annals of Thoracic Surgery.

Kazuhiro Hayashi, PT, from Nagoya University Hospital in Japan, and colleagues investigated the association between preoperative 6MWD with POCD in 181 patients (mean age, 71.4 years) undergoing cardiac operations. 

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The researchers found that the POCD group had a significantly lower 6MWD (median, 400m) versus the non-POCD group (median, 450m). Independent risk factors for POCD included the 6MWD, intensive care unit length of stay, age, and the Mini-Mental State Examination score. For each increase of 50 m in the 6MWD the odds of POCD decreased (odds ratio, 0.807).

"If we are able to identify patients who are at risk for POCD, we can provide early treatment and encourage them to better understand the dysfunction," Hayashi said in a statement.

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