Abstract TP297: Type II Myocardial Infarction is Significantly Associated with Admission NIHSS and Discharge Disposition Following Ischemic Stroke


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Abstract

Introduction: Troponin elevations due to Type II myocardial infarction (T2MI) are associated with increased mortality after hemorrhagic stroke but there is little data on stroke severity or outcome following ischemic stroke.Methods: All stroke discharges from UH-Case Medical Center between 1/2013- 4/2015 were reviewed for demographics, vascular risk factors, admission stroke severity, labs, echocardiogram results and discharge disposition. Troponin levels were normal (<0.04ng/ml), high (0.04-0.5ng/ml), or critical (>0.5ng/ml). A T2MI was diagnosed by a trending troponin elevation; patients with T1MI were excluded. Analyses used SPSS.Results: Troponin levels were normal in 65%, high in 28% and critical in 7% in 1655 patients (1052 ischemic stroke, 434 intracerebral hemorrhage, 169 subarachnoid hemorrhage) and were associated with admission stroke severity (figure). Ischemic stroke patients were mean age 69 yrs (20-101), 50.4% female with mean admission NIHSS 9.3 (0-36). T2MI was associated with higher NIHSS >10 (p=.000), SCr (p=.000) and age (p=.005), lower LDL (p=.000) and SBP (p=.012), and history of AF (p=.021), CAD (p=.000), and HF (p=.000). The significant association with admission NIHSS (p=.002) persisted after adjustment for age (p = .056), gender, LDL (p = .007), CAD (p= .023), heart failure (p = .003), atrial fibrillation, systolic BP, A1C, BMI, and SCr (p=.009). Initial troponin levels for the 8.3% who died or DC to hospice were high in 43% and critical in 24%. Initial and peak troponin levels were significantly associated with DC disposition (p=.000).Conclusion: Elevated troponin due to T2MI is significantly associated with admission ischemic stroke severity, persisting after adjustment of other risk factors, and predicts a poorer outcome. Troponin levels should be obtained on admission for acute stroke to establish the diagnosis of T2MI and capture its impact as a major comorbid condition.

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