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Vipin Zamvar a Department of Cardiac
Surgery, University Hospital of Wales, Cardiff CF14 4XW, b Department of
Anaesthesiology, University Hospital of Wales, c Medical Data Research
Centre, Providence Health System, Portland, OR 97225, USA, d Department of Immunology, UK National External
Quality Assurance Scheme, Sheffield S5 7YT
Correspondence to: Mr V Zamvar
Department of Cardiac Surgery, Royal Infirmary of Edinburgh, Edinburgh
EH3 9YW zamvarv{at}hotmail.com
Objective:
To assess neurocognitive impairment after the off-pump and on-pump techniques for coronary artery bypass graft
surgery in patients with triple vessel disease.
What is already known on this topic
Cardiopulmonary bypass has been implicated, but the evidence is
inconclusive What this study adds
Design:
Randomised controlled trial.
Setting:
University Hospital of Wales, Cardiff.
Participants:
60 patients undergoing coronary artery
bypass graft surgery for triple vessel disease prospectively randomised to the off-pump or on-pump technique.
Main outcome measures:
Change in scores in nine
standard neuropsychometric tests administered preoperatively and at 1 and 10 weeks postoperatively.
Results:
The on-pump group showed a significantly
greater deterioration in scores for two and three tests at 1 week and 10 weeks postoperatively, respectively, than the off-pump group. The
on-pump group also showed a significantly higher incidence of major
deterioration in one of the tests both 1 week and 10 weeks
postoperatively. The incidence of neurocognitive impairment at 1 week
postoperatively was 27% (8 out of 30) in the off-pump group and 63%
(19 out of 30) in the on-pump group (P=0.004); and at 10 weeks
postoperatively was 10% (3 out of 30) in the off-pump group and 40%
(12 out of 30) in the on-pump group (P=0.017).
Conclusion:
Off-pump coronary artery bypass graft
surgery results in less neurocognitive impairment than the on-pump technique.
Neurocognitive impairment after coronary artery bypass graft surgery
occurs in a major proportion of patients
Off-pump coronary artery bypass graft surgery results in less
neurocognitive impairment than the on-pump technique
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