Cardiac troponins and mortality in type 1 and 2 myocardial infarction

Author:

Lippi GiuseppeORCID,Sanchis-Gomar Fabian,Cervellin Gianfranco

Abstract

AbstractBackground:The pathogenesis of different types of myocardial infarction (MI) differs widely, so that accurate and timely differential diagnosis is essential for tailoring treatments according to the underlying causal mechanisms. As the measurement of cardiac troponins is a mainstay for diagnosis and management of MI, we performed a systematic literature analysis of published works which concomitantly measured cardiac troponins in type 1 and 2 MI.Methods:The electronic search was conducted in Medline, Scopus and Web of Science using the keywords “myocardial infarction” AND “type(-)2” OR “type II” AND “troponin” in “Title/Abstract/Keywords”, with no language restriction and date limited from 2007 to the present.Results:Overall, 103 documents were identified, but 95 were excluded as precise comparison of troponin values in patients with type 1 and 2 MI was unavailable. Therefore, eight studies were finally selected for our analysis. Two studies used high-sensitivity (HS) immunoassays for measuring cardiac troponin T (HS-TnT), one used a HS immunoassay for measuring cardiac troponin I (HS-TnI), whereas the remaining used conventional methods for measuring TnI. In all studies, regardless of type and assay sensitivity, troponin values were higher in type 1 than in type 2 MI. The weighted percentage difference between type 1 and 2 MI was 32% for TnT and 91% for TnI, respectively. Post-discharge mortality obtained from pooling individual data was instead three times higher in type 2 than in type 1 MI.Conclusions:The results of our analysis suggest that the value of cardiac troponins is consistently higher in type 1 than in type 2 MI.

Publisher

Walter de Gruyter GmbH

Subject

Biochemistry (medical),Clinical Biochemistry,General Medicine

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