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Article
February 9, 1990

Fourth-Order Blood Pressure Waves

Author Affiliations

From the Section of Critical Care Medicine, Department of Anesthesiology, Rush-Presbyterian—St Luke's Medical Center, Chicago, Ill.

From the Section of Critical Care Medicine, Department of Anesthesiology, Rush-Presbyterian—St Luke's Medical Center, Chicago, Ill.

JAMA. 1990;263(6):856-857. doi:10.1001/jama.1990.03440060102040
Abstract

A critically ill 80-year-old man had blood pressure waves with a period of about 30 minutes. These blood pressure oscillations, lasting longer than 18 hours, were accompanied by oscillations in heart rate, central venous pressure, pulmonary arterial pressure, and oxygen saturation of mixed venous blood. No discernible variations in external conditions caused the oscillations. Oscillations with such long periods heretofore have not been reported.

(JAMA. 1990;263:856-857)

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