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Neurology. 2001 Sep 11;57(5):833-8.

Prognostic relevance of pathological sympathetic activation after acute thromboembolic stroke.

Author information

  • 1Department of Neurology, Technical University of Munich, Germany. Dirk.Sander@neuro.med.tu-muenchen.de

Abstract

OBJECTIVE:

To evaluate the prognostic impact of early pathologic sympathetic activation after stroke.

METHODS:

The authors examined 112 consecutive patients (mean age, 69 years; 60 men) with their first brain infarction. A pathologic sympathetic activation was presumed if the initial norepinephrine level exceeds 300 pg/mL. In addition, involvement of the insular cortex, nighttime blood pressure changes, and several cardiovascular risk factors were determined. One-year outcome measures were mortality rate, cardiovascular and cerebrovascular events, and activities of daily living (Barthel index and Rankin score).

RESULTS:

Norepinephrine levels greater than 300 pg/mL, nighttime blood pressure increases, and insular involvement were associated with a lower Barthel index (p < 0.005) at the 1-year follow-up. By stepwise logistic regression analysis, insular infarction, serum norepinephrine concentration, right-sided infarction, and nighttime blood pressure increase were significant and independent predictors of an unfavorable functional outcome. Cox regression analysis showed a higher rate of cardiovascular and cerebrovascular events (hazard ratio, 2.9; 95% CI, 1.07; 6.83; p < 0.04) in patients with initially increased norepinephrine concentrations.

CONCLUSIONS:

The involvement of the insular cortex, the occurrence of a pathologic nighttime blood pressure increase, and an initially increased serum norepinephrine concentration are independent predictors of poor long-term outcome.

PMID:
11552013
[PubMed - indexed for MEDLINE]
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