Baseline Troponin T level in stroke and its association with stress cardiomyopathy
Kai Liesirova1, Eugenio Abela1, Thomas Pilgrim2
1Department of Neurology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
Insights
Elevated high-sensitive Troponin T (hsTnT) in acute ischemic stroke is linked to stroke severity and kidney function, not stroke size. Differentiating myocardial infarction from neurogenic stunned myocardium requires further cardiac investigations.
Area of Science:
- Cardiology
- Neurology
- Biomarkers
Background:
- Elevated high-sensitive Troponin T (hsTnT) in acute ischemic stroke (AIS) presents a diagnostic challenge, with differential diagnoses including myocardial infarction (MI) and neurogenic stunned myocardium (NSM).
- Understanding factors associated with hsTnT elevation is crucial for accurate diagnosis and patient management in AIS.
Purpose of the Study:
- To identify factors associated with baseline hsTnT levels in patients with acute ischemic stroke.
- To explore predictors of myocardial infarction (MI) and neurogenic stunned myocardium (NSM) in the context of elevated hsTnT in AIS.
Main Methods:
- Retrospective analysis of 204 consecutive patients with AIS from the Bern Stroke Database.
- Review of patient histories, cardiac examinations, and brain imaging (diffusion/perfusion weighted MRI) including lesion volumetry.
- Linear regression analysis to identify predictors of hsTnT levels and MI.
Main Results:
- Elevated hsTnT was observed in 28.4% of patients.
- hsTnT elevation correlated with creatinine levels, baseline NIHSS score, ST segment depression, and inverted T waves on ECG.
- Stroke infarct location and size were not associated with hsTnT elevation. MI was diagnosed in 7 of 30 patients who underwent coronary angiography.
Conclusions:
- Baseline hsTnT elevation in AIS is associated with stroke severity and cardiac abnormalities but not stroke size.
- Current factors are insufficient to differentiate between MI and NSM, necessitating further cardiac investigations like coronary angiography or cardiac MRI.
Background:
Differential diagnosis of elevated high sensitive Troponin T (hsTnT) in acute ischemic stroke includes myocardial infarction (MI) and neurogenic stunned myocardium (NSM). The aim of this study was to identify factors associated with baseline hsTnT levels and MI or NSM in acute ischemic stroke.
Methods:
We studied 204 consecutive patients of the prospective acquired Bern Stroke Database with acute ischemic stroke diagnosed by brain MR. All patient histories and cardiac examinations were reviewed retrospectively. Volumetry of lesions on diffusion and perfusion weighted brain imaging (circular singular value decomposition, Tmax >6sec) was performed. Voxel based analysis was performed to identify brain areas associated with hsTnT elevation. Linear regression analysis was used to identify predictors of baseline hsTnT levels and myocardial infarction.
Results:
Elevated hsTnT was observed in 58 of the 204 patients (28.4%). The mean age was 68.3 years in the normal hsTnT group and 69.7 years in the elevated hsTnT group. Creatinine (p<0.001, OR 6.735, 95% CI 58.734-107.423), baseline NIHSS score (p = 0.029, OR 2.207, 95% CI 0.675-12.096), ST segment depression (p = 0.025, OR 2.259, 95% CI 2.419-35.838), and negative T waves in baseline ECG (p = 0.002, OR 3.209, 95% CI 13.007-54.564) were associated with hsTnT elevation, while infarct location and size were not. Coronary angiography was performed in 30 of the 204 patients (14.7%) and myocardial infarction was diagnosed in 7 of them (23.3%). Predictive factors for myocardial infarction could not be identified.
Conclusion:
Elevated baseline baseline hsTnT was associated with NIHSS, creatinine, ST segment depression and inverted T waves, but not with stroke location or size. None of the factors was helpful to differentiate MI and NSM. Therefore, ancillary investigations such as coronary angiography, cardiac MRI or both may be needed to solve the differential diagnosis.
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