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Updated: Aug 13, 2026

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
Published on: March 27, 2018
[Cognitive impairment after coronary artery bypass grafting surgery]
Wojciech B Bartman1, Krystyna B Pierzchała
1Katedry i Kliniki Neurologii w Zabrzu Slaskiej Akademii Medcznej w Katowicach.
Insights
Neurological complications, including cognitive decline, persist after coronary artery bypass grafting (CABG) surgery despite reduced mortality. Early cognitive impairment predicts long-term deficits, influenced by surgery type and patient factors.
Area of Science:
- Cardiovascular Surgery
- Neurology
- Cognitive Science
Context:
- Coronary artery bypass grafting (CABG) has seen reduced mortality due to improved perioperative care.
- Neurological complications, particularly cognitive decline, remain a significant challenge post-CABG.
- Cognitive impairment affects a substantial percentage of patients immediately after surgery, with varying rates at follow-up.
Purpose:
- To review the multifactorial nature of cognitive impairment after CABG.
- To identify key factors influencing cognitive outcomes, including demographic, medical history, and perioperative variables.
- To discuss the mechanisms of neurological damage and propose standardized neuropsychological testing protocols.
Summary:
- Cognitive decline post-CABG is multifactorial, influenced by patient characteristics and surgical methods (on-pump vs. off-pump).
- Mechanisms include microembolic signals, cerebral hypoperfusion, and systemic inflammatory response.
- Neuropsychological testing before and after CABG is recommended to assess cognitive function, with specific criteria for significant decline.
Impact:
- Highlights the persistent risk of neurological complications despite advances in cardiac surgery.
- Emphasizes the need for comprehensive pre- and post-operative cognitive assessment in CABG patients.
- Informs clinical practice regarding patient selection, surgical technique, and post-operative monitoring to mitigate cognitive deficits.
Abstract:
Improvement of cardiosurgery treatment and perioperative care of CABG (coronary artery bypass grafting) patients has been associated with essential reduction of early mortality. Nevertheless neurological complications have not changed. Cerebrovascular death, stroke, encephalopathy and cognitive decline remain the most common disturbances. Cognitive impairment after CABG seems to be a multifactorial problem. Demographic, medical history and perioperative factors strongly influence cognitive outcome. Incidence of decline is common immediately after surgery (53-79%), less frequent after 6 months (10-30%) and it depends on cardiosurgery method (on-pump > off-pump surgery). Early impairment is the predictor of late cognitive deficit in the 5-year follow-up. Microembolic signals, cerbral hypoperfusion and systemic inflammatory response are the main reasons of damage. Neuropsychological tests consist of verbal and non-verbal memory, visuo-spatial and construction abilities, motor speed, language and executive functions evaluation. It is proposed to perform examinations before the operation and at least 3 months after CABG Twenty per cets or 1 SD decline in at least 20% of tests will be significant. Anxiety and depression signs should be taken into consideration as well.
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