Monitoring the Electroencephalogram During Bypass Procedures

Abstract

Electroencephalographic monitoring has been performed since the early days of cardiopulmonary bypass. Despite this long experience, the technology has never been widely used for cardiac operations. This review examines the reasons for the limited use and describes technological advances that may alter this pattern.

The Influence of Low and Moderate Carotid Stenosis on Neurophysiologic Status of Patients Undergoing on-pump Coronary Artery Bypass Grafting

“…This assumption is confirmed the higher theta power values in the resting EEG detected in these patients after CABG. Our data are consistent with the results of Gugino et al (2004), where it was shown an increase of the theta power under cerebral blood flow below 22 ml/100 g/min. The other studies has reported (Sazonova, 1999; Ogurtsova, 2005) about theta increase during endovascular intervention (temporary occlusion ICA by balloon system).…”

SYNTAX score effect on electroencephalography power dynamics in patients undergoing on-pump coronary artery bypass grafting

“…According to the literature, an increase of low-frequency activity in the resting state EEG, or “EEG slowing”, can be considered a marker of ischemic brain damage [8,10]. Brain damage may result from hypoperfusion and microembolisms during CPB [12], and this effect may continue after surgery.…”

“…The noninvasiveness and simplicity of this method makes it possible to observe the dynamics of brain function recovery during the postoperative period [8,9]. A statistically significant relation has been found between the characteristics of intraoperative EEG and cognitive deficits for 2–3 months after CPB surgery [10]. Most of the association between cerebral hypoperfusion and EEG changes was identified during carotid surgery [10,11].…”

“…A statistically significant relation has been found between the characteristics of intraoperative EEG and cognitive deficits for 2–3 months after CPB surgery [10]. Most of the association between cerebral hypoperfusion and EEG changes was identified during carotid surgery [10,11]. …”

Mild cognitive impairment in patients with coronary artery disease: clinical-demographyc and EEG-correlates

“…Установлено [20,33], что увеличение мощности и амплитуды Δ-и θ-ритмов (или «замедление» ЭЭГ) в состоянии спокойного бодр-ствования предположительно является признаком рас-тормаживания подкорковых структур, угнетения актив-ности коры, происходящих вследствие острой или хрони-ческой ишемии мозга. Замедление ЭЭГ-ритмики было обнаружено [34] при падении мозгового кровотока ниже 22 мл/100 г/мин. В нашей работе пациенты с ИБС прохо-дили обязательное неврологическое обследование в ком-бинации с результатами МСКТ, это позволяло с большой долей вероятности исключить нейродегенеративный ха-рактер КР, и в большей степени предполагать, что при-чиной развития нарушений когнитивных функций явля-ется сосудистый процесс, в частности хроническая ише-мия головного мозга (ХИГМ).…”