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A Clinical Study of Impedance Cephalography for Evaluation of Cerebrovascular Disorders

ARTHUR G. WALTZ, MD; CHARLES D. RAY, MD

Arch Neurol. 1967;16(1):94-102.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

A RELIABLE and sensitive technique for the simple and safe measurement, through the intact skull, of changes in the flow or circulation of blood in the human brain would be extremely useful for the diagnosis and management of cerebrovascular disorders. "Rheoencephalography," which we prefer to call "impedance cephalography," has been proposed as a method for the study of the cerebral circulation. Basically, impedance cephalography is the technique of impedance plethysmography, applied to the head. The impedance recorded from the head during the passage of an electric current changes with the cardiac cycle; the cyclic changes of impedance presumably are related in some way to the entrance of blood into the head.

Certain earlier reports^1,2 on the use of impedance cephalography for the diagnosis of cerebrovascular disease indicated that the technique is of little value. These earlier studies have been criticized by proponents³ (R. Sano and R. Namon, personal . . . [Full Text PDF of this Article]

Author Affiliations
ROCHESTER, MINN

From the Section of Neurology, Cerebrovascular Clinical Research Center, Mayo Clinic and Mayo Foundation (Dr. Waltz); and Mayo Graduate School of Medicine, University of Minnesota (Dr. Ray), Rochester, Minn.

Footnotes
Submitted for publication Aug 11, 1966; accepted Sept 20.

Reprint requests to Mayo Clinic, 200 First St SW, Rochester, Minn 55901.

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