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(Stroke. 2002;33:2154.)
© 2002 American Heart Association, Inc.

Letters to the Editor

Body Temperature in Acute Stroke

Kiyoshi Takagi, MD

Department of Neurosurgery, Teikyo University School of Medicine, Tokyo, Japan

An extract of the first 250 words of the full text is provided, because this article has no abstract.

To the Editor:

I read with great interest the recent article by Boysen and Christensen¹ on body temperature. Their study is probably the first to have described the hourly changes in body temperature after onset of stroke and intracerebral hemorrhage. Although they used paracetamol for the patient with a body temperature >37°C, the pattern was very similar to that observed in an animal experiment.² This suggests that the basic mechanisms underlying the temperature changes after cerebral stroke are the same in both animals (rats) and humans. However, I have one very serious question. The authors measured body temperature at the tympanic membrane but did not show the normal value of the body temperature measured by this method. They administered paracetamol to reduce body temperature when the temperature exceeded 37.0°C. However, several studies have documented that the normal body temperature measured at the tympanic membrane is 37.5°C.^3,4 This means that, in fact, the initial body temperature after cerebrovascular disorders reported by them (36.5°C) may have been lower than normal (ie, hypothermic). Therefore, I think that the true explanation of their result is that cerebral ischemia or intracerebral hemorrhage can lower body temperature, at least for the first few hours after onset.

1. Boysen G, Christensen H. Stroke severity determines body temperature in acute stroke. Stroke. 2001; 32: 413–417.[Abstract/Free Full Text]

2. Li F, Omae T, Fisher M. Spontaneous hyperthermia and its mechanism in the intraluminal suture middle cerebral artery occlusion model of rats. Stroke. 1999; 30: 2464–2471.[Abstract/Free Full Text]

3. Brinnel H, Cabanac M. Tympanic temperature is a core temperature in humans. J Therm Biol. 1989; 14: 47–53.[CrossRef]

4. Yoshiue S, Yoshizawa H, Ito H, Nagashima K, Takeda K, Yazumi T, Takeuchi H, Nakamura N, Nagae M, Ogata J, Ishida M, Kawashima Y, Uchino K. Body temperature [in Japanese]. Sohgo Rinsho. 1985; 34: 1599–1606.

Response

Gudrun Boysen, MD, DMSc Hanne Christensen, MD

Bispebjerg Hospital, Department of Neurology, Copenhagen, Denmark

We thank Dr Takagi for his interest in our study on body temperature in acute stroke. In our study, temperature was measured by a tympanic thermometer, FirstTemp Genius 3000 A. Dr Takagi suggests that normal body temperature at the tympanic membrane is 37.5°C, and that our patients were hypothermic initially.

We recently compared . . . [Full Text of this Article]

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