Cognitive function after on or off pump coronary artery bypass grafting

Area of Science:

• Cardiology
• Neurology
• Surgical Outcomes

Background:

• Coronary artery bypass grafting (CABG) is a common procedure for treating coronary artery disease.
• Concerns exist regarding potential cognitive decline following CABG, with varying outcomes reported between on-pump and off-pump techniques.
• Understanding the impact of surgical approach on cognitive function is crucial for patient management.

Purpose of the Study:

• To compare post-operative cognitive outcomes in patients undergoing on-pump versus off-pump CABG.
• To evaluate differences in attention, memory, executive functions, anxiety, and depression between the two surgical groups.

Main Methods:

• A prospective, randomized study involving 70 patients aged 50-80 with stable angina.
• Patients were randomized to either on-pump or off-pump CABG.
• Cognitive function, anxiety, and depression were assessed using standardized neuropsychological tests and questionnaires before and at 1 week, 1 month, and 6 months after surgery.

Main Results:

• No significant difference in the incidence of cognitive impairment between the on-pump and off-pump groups at any follow-up point.
• Cognitive impairment rates at 6 months were 19% for on-pump and 15% for off-pump (p=0.19).
• No differences were observed in anxiety (p=0.18) or depression (p=0.48) levels between the groups.

Conclusions:

• This randomized study demonstrates no significant difference in post-operative cognitive function between on-pump and off-pump CABG in low-risk patients.
• Both surgical methods appear to have comparable effects on cognitive outcomes and psychological well-being.
• The findings suggest that surgical approach may not be a determining factor for cognitive outcomes in this patient population.