Introduction: Cognitive defects are frequently described after cardiac surgery. They occur in 30 to 79% cases. They might be related to the use of a cardiopulmonary bypass (CPB). They are poorly evaluated in clinical practice.
Objectives: To evaluate the usefulness of the Mini Mental State Examination (MMSE) to screen patients scheduled for cardiac surgery.
Study Design: Prospective, open study.
Patients And Methods: 100 consecutive patients undergoing coronary artery bypass or valvular replacement under CPB were enrolled in the study. The MMSE was performed the day before surgery and five days later. Patients exhiting a postoperative defect> or =4 points were compared to those without changes or with improved results.
Results: 73 patients completed both tests. The mean score decreased postoperatively in 12 patients (15%). They were older (70+/-8 years), had longer CBP durations (128+/-50 min) and the lowest temperatures (30 degrees C+/-3) compared to the other patients. At the opposite, five patients (9%) improved their scores.
Conclusion: These results entourage to carry out a more strict follow-up for the oldest patients in cardiac surgery. The MMSE could be systematically integrated to the pre and postoperative screening. The detection of cognitive dysfunction should lead to address the patient to a geriatrician for a prolonged follow-up.
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