BACKGROUND:
Troponin values above the threshold established to diagnose acutemyocardial infarction(AMI; >99thpercentile) are commonly detected in patients with diagnoses other than AMI. The objective of this study is to compare inpatient mortality and 30-day readmission rate in patients with troponin I (TnI) above and below the 99th percentile in those with type 1 AMI and type 2myocardialinjury.
Between January 1st, 2016 through December 31st, 2016 there were 56,895 inpatient hospitalizations and of these, 14,326 (25.2%) patients received troponin testing. We evaluated mortality and readmissions in the entire cohort based on the primary discharge International Classification of Diseases, Tenth Edition (ICD-10) diagnosis and grouped into type 1 AMI versus other diagnoses comprising the type 2 AMI group (including ICD-10 codes for congestive heart failure (CHF), sepsis, and other). Among those with TnI drawn, we evaluated in-hospital mortality and 30-day readmissions based on troponin values > 99thpercentile (>0.1 ng/ml).
Among the entire cohort, the inpatient mortality rate was significantly higher in those with TnI testing (5.0%, 95% CI 4.6%-5.3%) compared to those without testing (0.7%, 95% CI 0.6%-0.7%, p<0.01). In the tested cohort 3,743 (26%) patients had troponin levels above the 99th percentile (>0.1 ng/ml) and 10,583 (74%) had troponin levels below the 99th percentile (<0.1 ng/ml). Comparing type 2 AMI with type 1 AMI and troponin testing, TnI values >0.1 ng/ml were associated with higher inpatient mortality (11.6% vs. 3.9%) and 30-day readmission rates (16.9% vs. 10.7%).
A higher inpatient mortality and 30-day readmission rates were found in patients with type 2 AMI compared to type 1 AMI group.
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Inpatient Mortality and 30-Day Readmission Rates Associated with Troponin Testing in Patients without Acute Myocardial Infarction - DocWire News
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