Quantitative EEG as a measure of cerebral dysfunction before and after open-heart surgery

Sotaniemi, K. A.; Sulg, I; Hokkanen, Tuula

doi:10.1016/0013-4694(80)90325-9

Cited by 35 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…73 This work confirms earlier quantitative and conventional EEG studies that also demonstrated high correlations between postoperative EEG change and changes in neurologic function. 8,11,17,73,79 In addition, this evidence supports the need to evaluate the relationship of intraoperative QEEG changes to postoperative central nervous system dysfunction. Finally, the results suggest that future research efforts may result in the QEEG being used as an alternative to the more costly and time-consuming cognitive function evaluation that uses neuropsychometric tests.…”

Section: Effects Of Cognitive Dysfunction On the Eegmentioning

confidence: 79%

“…[1][2][3][4][5][6] Several studies have examined the relationship between perioperative EEG changes and postoperative neurologic dysfunction. [7][8][9][10][11][12][13][14][15][16][17] • Monitor the patient's level of consciousness during anesthesia. [18][19][20] Several special purpose computerized quantitative EEG (QEEG) analyzers have been designed for this use.…”

Section: Origins Of the Eegmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring the Electroencephalogram During Bypass Procedures

Gugino

Aglio

Yli‐Hankala

2004

Semin Cardiothorac Vasc Anesth

View full text Add to dashboard Cite

show abstract

Section: Effects Of Cognitive Dysfunction On the Eegmentioning

confidence: 79%

Section: Origins Of the Eegmentioning

confidence: 99%

Monitoring the Electroencephalogram During Bypass Procedures

Gugino

Aglio

Yli‐Hankala

2004

Semin Cardiothorac Vasc Anesth

View full text Add to dashboard Cite

show abstract

“…Using QEEG Sotaniemi et al [29] found postoperatively a significant increase of neuropsychologic complications in patients having preoperatively a mean frequency in the parieto-occipital leads of being equal or less than 7 Hz. In their study the amplitude changes present in the parietooccipital leads, did not have prognostic value as much as we found in the occipital leads.…”

Section: Preoperative Qeegmentioning

confidence: 99%

“…A special remark concerns the higher amplitudes at the rightside during EECC. Sotaniemi et al [29] found also significantly abnormal QEEG results but at the tenth postoperative day and mainly present at the rightsided parieto-occipital lead. This suggests that the right hemisphere could be more affected than the left one, i.e., more susceptible to the harmful effects of extracorporeal circulation.…”

Section: Intraoperative Qeegmentioning

confidence: 99%

Delirium and cognitive disorders after cardiac operations: relationship to pre- and intraoperative quantitative electroencephalogram

et al. 1997

Int. J. Clin. Mon. Comp.

View full text Add to dashboard Cite

We examined the incidence of delirium and cognitive disorders after cardiac operations and the related risk factors. The value of pre- and intraoperative QEEG was determined. Using the Mini-Mental State Examination and the Saskatoon Delirium Checklist, 321 patients were tested during the immediate postoperative period. Forty-four patients (14%) showed delirium, 68 (23%) cognitive disorders and 26 (9%) both. Significant risk factors for the development of cognitive disorders were age > or = 70 yr, female gender, duration of cardiopulmonary bypass > or = 2.5 h and aorta-cross-clamping > 70 min. Risk factors for delirium were age > or = 70 yr, female gender and Hb < 5 mmol 1(-1) intraoperatively. The preoperative QEEG showed significant differences between the groups with and without a cognitive disorder, while the intraoperative QEEG showed significant differences between the groups with and without delirium. Different risk factors for delirium and cognitive disorders are a possible explanation for the controversies in the literature, where neuropsychologic complications were grouped together. A low intraoperative Hb is an important risk factor for the development of delirium and can be treated. The preoperative QEEG may have prognostic significance in the occurrence of cognitive disorders, while the intraoperative QEEG may have prognostic significance in the occurrence of delirium.

show abstract

“…Besides certain preoperative factors, the duration of perfusion is one of the major determinants of CNS outcome.45892327 [30][31][32][33] The harmful effect of long perfusion time was evident also in the longterm EEG outcome; the EEG difference between the short and long perfusion time groups was accentuated with advancing follow-up time. Significantly, the influence of perfusion time was also seen in the clinically non-affected patients and not solely in the patients who had sustained clinical complications at operation.…”

Section: Discussionmentioning

confidence: 99%

Five-year neurological and EEG outcome after open-heart surgery.

Sotaniemi¹

1985

Journal of Neurology, Neurosurgery & Psychiatry

View full text Add to dashboard Cite

SUMMARY A five-year neurological and EEG follow-up was carried out on 55 patients who had undergone open-heart surgery for valve replacement in order to investigate the long-term results of the treatment. The five-year survival rate was 89%. The prevalence of permanent neurological abnormalities after operation was 9%. Transient ischaemic attacks occurred in five patients but no more severe cerebrovascular accidents were encountered. The rate of embolic events was 2'8 per 100 patient-years. Various subjective symptoms and complaints showed a highly beneficial outcome. Also the five-year EEG outcome was encouraging; the prevalence of abnormal EEG had fallen from the value before operation of 45% to 25%. The harmful influence of long perfusion time (extracorporeal circulation) during operation was found to be reflected in the long-term EEG outcome and, significantly, not only in the patients who had, but also in those who had not developed clinical abnormalities complicating the immediate course after operation. Although a valvular surgery patient faces a number of CNS problems before, during and after operation, the overall long-term outcome of successful surgery seems highly beneficial in neurological terms.The vast literature devoted to the central nervous system (CNS) effects of open-heart surgery has emphasised the multiplicity of potentially harmful factors to which patients are exposed before' -3 and during45 the operation. In particular, the risks of CNS dysfunction during the operation, mostly related to extracorporeal circulation, have been thoroughly scrutinised6-'4 and due to the attention paid to them they have diminished strikingly.4 5 I5 16 However, cardiac surgery patients face many problems even after the correction of the major circulatory disturbance; for example they are exposed both to embolisation from the artificial valve and to the side-effects of the life-long anticoagulant therapy'I-21 required with most of the types of prostheses. Thus far, neurological studies in open-heart surgery patients have been limited to describing the immediate results after operation while the later outcome has been passed over. Indeed, because most of the occasional clinical complications have been mild and reversible, investigators seem to have

show abstract

Quantitative EEG as a measure of cerebral dysfunction before and after open-heart surgery

Cited by 35 publications

References 24 publications

Monitoring the Electroencephalogram During Bypass Procedures

Monitoring the Electroencephalogram During Bypass Procedures

Delirium and cognitive disorders after cardiac operations: relationship to pre- and intraoperative quantitative electroencephalogram

Five-year neurological and EEG outcome after open-heart surgery.

Contact Info

Product

Resources

About