MONITORING OF ELECTROENCEPHALOGRAM DURING OPEN-HEART SURGERY - PROSPECTIVE ANALYSIS OF 118 CASES

  • 1 January 1978
    • journal article
    • research article
    • Vol. 76  (1) , 97-100
Abstract
EEG was prospectively analyzed in 118 consecutive open-heart procedures. In 96 patients (81%) the records were normal whereas in 22 patients (19%) EEG showed slow wave activity and decreased electrical voltage. In 16 of these patients EEG abnormality was transient or only of mild degree. In 10 of this group of patients the abnormality occurred with the institution of total cardiopulmonary bypass (CPB) and returned to normal within 2 min. In 4 other patients the abnormalities were mild, persisted to the end of the CPB, and then returned to normal; in 2 patients EEG abnormalities developed in the last half of CPB and then returned to normal. In the remaining 6 patients EEG was grossly abnormal. In 1 of these patients the abnormality was secondary to a previous stroke. In 5 patients, however, EEG alerted the surgeon to an otherwise unsuspected poor cerebral blood flow. A serious neurologic insult was probably prevented by identifying and correcting the mechanical cause.

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