Postoperative Clinical and Neurophysiological Assessment of Patients After Open Heart Surgery

Coronary artery bypass grafting (CABAG) is one of the most common major surgical procedures, as more than 800,000 patients worldwide undergo myocardial revascularization procedures every year. Cardiopulmonary bypass (CPB) is an extracorporeal circulation procedure that assists the operation of cardiac and great vessels and is associated with perioperative morbidity and mortality.

Preoperative neurophysiological status as measured by electroencephalogram (EEG) had a specificity of 94.7% and a sensitivity of 76.9% for predicting 1-week postoperative cognitive status and with specificity of 78.3% and a sensitivity of 77.8% for predicting 3-months postoperative cognitive status.

Inclusion criteria

• Patient ≥ 60 years.
• Both sexes.
• Patients who are scheduled for on-pump open heart surgery either isolated coronary artery bypass grafting (CABG) or combined CABG and valve surgery.

Exclusion criteria

• Patients with a past history of CNS disease (e.g. Epilepsy, brain tumors, or Dementia).
• Patients with metabolic disturbance.
• Illiterate patient.
• Patient with sever cognitive impairment on Mini-mental state Examination (MMSE) and/or Montreal Cognitive Assessment (MoCA)
• Patients who cannot undergo DEEG recordings (eg, uncooperative).
• Patients with abnormal brain images except for small vessel disease.