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(Stroke. 1972;3:456.)
© 1972 American Heart Association, Inc.

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Cerebral Hemispheric "Counter-Steal" Phenomenon During Hyperventilation in Cerebrovascular Diseases

G. RAIMONDO PISTOLESE M.D.¹; VITTORIO FARAGLIA M.D.¹; ALESSANDRO AGNOLI M.D.²; MASSIMILIANO PRENCIPE M.D.²; ENRICA PASTORE M.D.¹; CARLO SPARTERA M.D.¹; PAOLO FIORANI M.D.¹

¹ Second Surgical Clinic, University of Rome, Italy
² First Clinic for Mental and Nervous Disease, University of Rome, Italy

Use of hyperventilation (HV) was recently suggested for the treatment of acute cerebrovascular insufficiency. There is indeed no general agreement on the effectiveness of hyperventilation even though clinical and experimental findings could support its value in clinical use.

During carotid surgery, hyperventilation was used in order to attenuate cerebral ischemia effects during carotid clamping, and a counter-steal phenomenon affecting a whole cerebral hemisphere was demonstrated.

This suggests the role that hyperventilation may play in the treatment of cerebral ischemia.

Key Words: cerebrovascular insufficiency • hypocapnia • cerebrovascular reactivity • Xenon 133