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Updated: May 8, 2026

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
Published on: March 27, 2018
Cerebral dysfunction after coronary artery bypass surgery
1Department of Anesthesiology, Itoh Dento-Maxillofacial Hospital, 4-17 Kokaihonmachi, Kumamoto, 860-0851, Japan, togoto@bronze.ocn.ne.jp.
Insights
Cerebral dysfunction after cardiac surgery is a growing concern, especially in aging populations. This review highlights the link between perioperative stress, brain fragility, and neurological complications like stroke and cognitive dysfunction.
Area of Science:
- Neurology
- Cardiology
- Geriatrics
Background:
- Cerebral dysfunction, including stroke, encephalopathy, and POCD, is a significant complication of cardiac surgery.
- Cardiopulmonary bypass is a primary cause of neurological issues due to emboli, hypoperfusion, and inflammation.
- Aging populations are increasingly susceptible to these neurological complications.
Purpose of the Study:
- To review recent findings on perioperative stress and brain fragility in cardiac surgery patients.
- To explore patient-related factors influencing postoperative neurological complications.
- To identify preventative strategies for cerebral dysfunction after cardiac surgery.
Main Methods:
- Review of recent literature on perioperative stress and neurological outcomes in cardiac surgery.
- Analysis of the impact of cardiopulmonary bypass versus off-pump procedures.
- Focus on patient-related factors, particularly advanced age and cerebrovascular disease.
Main Results:
- Off-pump CABG may reduce stroke risk but shows no clear benefit for POCD compared to on-pump.
- Advanced age is a major risk factor for stroke and POCD due to undiagnosed cerebrovascular disease.
- Perioperative stress and underlying brain fragility are key factors in postoperative neurological dysfunction.
Conclusions:
- Preoperative cerebrovascular evaluation and tailored surgical strategies are crucial for prevention.
- Understanding the interplay between aging, stress, and brain health is vital for improving outcomes.
- Future research should focus on patient-specific factors to mitigate neurological risks post-cardiac surgery.
Abstract:
Cerebral dysfunction after cardiac surgery remains a devastating complication and is growing in importance with our aging populations. Neurological complications following cardiac surgery can be classified broadly as stroke, encephalopathy (including delirium), or postoperative cognitive dysfunction (POCD). These etiologies are caused primary by cerebral emboli, hypoperfusion, or inflammation that has largely been attributed to the use of cardiopulmonary bypass. Preventative operative strategies, such as off-pump coronary artery bypass grafting (CABG), can potentially reduce the incidence of postoperative neurological complications by avoiding manipulation of the ascending aorta. Although off-pump CABG is associated with reduced risk of stroke, there are no convincing differences in POCD between off-pump and on-pump CABG. Recently, the focus of postoperative neurological research has shifted from managing cardiopulmonary bypass to patient-related factors. Identifying changes in brains of aged individuals undergoing cardiac surgery may improve strategies for preventing cerebral dysfunction. Advanced age is associated with more undiagnosed cerebrovascular disease and is a major risk factor for stroke and POCD following cardiac surgery. Preoperative cerebrovascular evaluation and adaptation of surgical strategies will provide preventative approaches for cerebral dysfunction after CABG. This review focuses on recent findings of the relationship between perioperative stress and underlying fragility of the brain in cardiac surgical patients.
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