J Clin Neurol.  2008 Jun;4(2):75-83. 10.3988/jcn.2008.4.2.75.

Cardiac Troponin T Elevation After Stroke: Relationships Between Elevated Serum Troponin T, Stroke Location, and Prognosis

• Song HS
• Back JH
• Jin DK
• Chung PW
• Moon HS
• Suh BC
• Kim YB
• Kim BM
• Woo HY
• Lee YT
• Park KY

• KMID: 2178926
• DOI: http://doi.org/10.3988/jcn.2008.4.2.75

Abstract

Background and Purpose
Elevation of serum cardiac troponin T (cTnT) is regarded as a specific marker of acute coronary syndrome. Serum cTnT can be increased in patients with acute ischemic stroke, but its clinical implications remain unclear. The aim of this study was to identify the relationships between elevated cTnT and stroke severity, location, and prognosis. Methods: From January 2005 to December 2006, this study recruited 455 consecutive patients who were admitted to Kangbuk Samsung Hospital due to acute ischemic stroke within 3 days of onset, which was confirmed by diffusion magnetic resonance imaging. A total of 416 patients was finally included and divided into 2 groups: an elevated cTnT group (n=45) and a normal cTnT group (n=371). The short-term prognosis was assessed by 30-day modified Rankin Scale responder analysis was compared between the two groups. Results: Serum cTnT was elevated in 10.8% of cases, with elevated cTnT associated with greater stroke severity, as assessed by the National Institutes of Health Stroke Scale score, Insular-lobe involvement was more common in patients with elevated cTnT than in the normal cTnT group. Short-term prognosis was more unfavorable in the elevated cTnT group than in the normal cTnT group. Multivariate regression analysis indicated that elevated cTnT was independently related to insular involvement, cardioembolism, and unfavorable outcome. Conclusions: Elevated cTnT in acute ischemic stroke was associated with severe neurological deficits at stroke onset and damages to the insular lobe. The outcome of acute ischemic stroke was worse for patients with elevated cTnT than for those with normal cTnT. The pathomechanism underlying acute ischemic stroke and subclinical myocardial damage warrants further study.

Keyword

Serum cardiac troponin T (cTnT); Diffusion magnetic resonance imaging; Acute myocardial infarction (AMI); Stroke; Prognosis

MeSH Terms

Acute Coronary Syndrome
Diffusion Magnetic Resonance Imaging
Humans
National Institutes of Health (U.S.)
Prognosis
Stroke
Troponin
Troponin T
Troponin
Troponin T

Figure

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  Figure 1 Diffusion-weighted magnetic resonance imaging (MRI) (A) and T2-weighted MRI (B) of a 68-year-old woman, showing an ischemic stroke involving the right insular lobe.

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  Figure 2 Levels of serum cardiac troponin T (cTnT in the elevated cTnT group, n=45).

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