Electroencephalography as a Tool for Assessment of Brain Ischemic Alterations after Open Heart Operations

Table 1

Subject characteristics and operative data.

	Open heart surgery	Controls	P
Number of subjects	22	8
Male/female sex ()	11/11	1/7	NS
Age (years)	45.2 ± 11.2	39.4 ± 16.6	NS
Education (years)	14.5 ± 2.8	15.4 ± 3.4	NS
MMSE at first assessment (score)	27.3 ± 2.6	27.6 ± 3.3	NS
MMSE at followup (score)	27.0 ± 3.0	28.1 ± 3.7	NS
History of hypertension ()	6	0	NS
History of diabetes ()	1	0	NS
History of atrium fibrillation ()	7	0	NS
NYHA class III and IV ()	8	0	0.046
Ejection fraction (%)	62.3 ± 7.0
End systolic size of left ventricular (mm)	35.6 ± 0.8
Mitral valve replacement ()	10
Aortic valve replacement ()	9
Aortic and mitral valve replacement ()	3
Cardiopulmonary bypass time (minute)	115.6 ± 49.5
Aortic cross-clamp time (minute)	73.9 ± 34.5
Postoperative delirium (𝑛)	3

Data given as means and SD, unless otherwise indicated.
Abbreviations: n: number of patients; NS: not significant; NYHA: New York Heart Association.