Rheoencephalography

Abstract

The mean values for ECG-REG time interval, amplitude, angle of inclincatlon, and wave forms for the rheoencephalogram (REG) in normal individuals obtained with the Schuhfried rheograph and the Physical Instrument REG have been described. In patients with increased intracranial pressure there are characteristic changes in the REG wave which include an increase in ECG-REG time interval, a greater amplitude of the wave, and concavity to the base line in the descending portion of the wave. In patients with cerebrovascular disease the REG is usually abnormal, with a wide variety of alterations occurring, usually lessened angle of inclination and smaller wave amplitude. The REG appears to be of value to detect and monitor alterations in intracranial pressure. Although it is of little clinical value in the diagnosis of cerebrovascular disease, the REG may provide information on changes in cerebral circulation that occur with aging or in patients with diffuse cerebrovascular disease.