Neurobehavioural sequelae of cardiopulmonary bypass

Area of Science:

• Cardiovascular Surgery
• Neuroscience
• Cognitive Psychology

Background:

• Coronary artery bypass grafting (CABG) has advanced significantly, improving angina management.
• Adverse neurobehavioral outcomes, including stroke and cognitive deficits, remain a concern after CABG.
• Pre-operative risk factors for stroke after CABG have been identified.

Purpose of the Study:

• To review the neurocognitive outcomes following CABG.
• To identify risk factors associated with cognitive decline after CABG.
• To discuss strategies for protecting patients from adverse neurocognitive outcomes.

Main Methods:

• Literature review of studies on neurocognitive outcomes after CABG.
• Analysis of demographic and medical risk factors.
• Examination of short-term and long-term cognitive deficits.
• Consideration of pre-operative depression as a factor.

Main Results:

• Short-term cognitive deficits are common post-CABG but may not be procedure-specific.
• Visuoconstruction deficits can persist long-term, potentially due to brain injury.
• Pre-operative depression often persists post-surgery but doesn't fully explain cognitive decline.
• Risk factors for cognitive decline can differ between short-term and long-term studies.

Conclusions:

• Despite advances in CABG, neurocognitive complications persist.
• Identifying patients at risk for adverse neurocognitive outcomes is essential.
• Modification of surgical procedures and effective medical therapies are needed to protect at-risk patients.