Disturbed circadian motor activity patterns in postcardiotomy delirium
Article first published online: 1 DEC 2008
© 2008 The Authors. Journal compilation © 2008 Japanese Society of Psychiatry and Neurology
Psychiatry and Clinical Neurosciences
Volume 63, Issue 1, pages 56–64, February 2009
How to Cite
Osse, R. J., Tulen, J. H. M., Bogers, A. J. J. C. and Hengeveld, M. W. (2009), Disturbed circadian motor activity patterns in postcardiotomy delirium. Psychiatry and Clinical Neurosciences, 63: 56–64. doi: 10.1111/j.1440-1819.2008.01888.x
- Issue published online: 15 JAN 2009
- Article first published online: 1 DEC 2008
- Received 14 January 2008; revised 3 September 2008; accepted 13 September 2008.
- cardiac surgery;
- motor activity;
- postcardiotomy delirium
Aims: More than 20% of patients of 65 years or older may develop a delirium after cardiac surgery. Patients with delirium frequently show a disturbed 24-hr motor activity pattern, but objective and quantitative data are scarce. Our aim was to quantify motor activity patterns in elderly patients with or without a postcardiotomy delirium after elective cardiac surgery.
Methods: Wrist-actigraphy was used to quantify 24-hr motor activity patterns for a 5-day period following cardiac surgery in 79 patients of 65 years or older. Clinical state was monitored daily by means of the Confusion Assessment Method-Intensive Care Unit and the Delirium Rating Scale-Revised 98.
Results: The activity Amplitude, and the daytime Activity/minute and Restlessness index were significantly higher and the daytime number of Immobility minutes significantly lower for the patients without delirium or with short delirium episodes, as compared to patients with a sustained delirium (>3 days).
Conclusions: Actigraphy proves to be a valuable instrument for evaluating motor activity patterns in relation to clinical state in patients with a postcardiotomy delirium.