Characteristics and Outcomes of Critically Ill Patients with Raised Cardiac Troponins Admitted in the Intensive Care Unit: A single centre experience from Oman

Abstract

Objectives: Critically ill patients have been shown to have raised troponins.  The aim of our study was to assess the incidence of myocardial injury in the intensive care unit (ICU) a tertiary care hospital in Oman and assess their management and prognosis. Methods: This was a retrospective study involving adult patients admitted to the ICU of our institution between 1^st January and 31^st December 2019 who had a high sensitive cardiac troponin (Hs-CTn) assay performed. We excluded patients who were admitted with a primary diagnosis of myocardial infarction. Results: A total of 264 patients had a Hs-cTn measured during this period. Of these 128 patients (64.3+17.1 years; 58.5% male) had elevated levels giving an incidence of around 48.4%. Those with raised troponin were older and had more co-morbidities. These patients were also more critical with lower blood pressure, higher heart rates, hypotensive episodes. Of the 128 patients, 47 were treated as acute coronary syndrome and 32 underwent coronary angiography. Of these only 3 patients required stenting. Patients with raised troponin had a poor outcome with only 45 (35.1%) surviving to discharge as compared to 73.5% where troponin was normal. They had a shorter hospital length of stay as compared to those with normal troponin (16(8-25) vs 19(13-28) p=0.017). Conclusion: A high proportion of critically ill patients have evidence of myocardial injury without significant coronary artery disease. It is associated with poor prognosis. Further prospective studies are required to ascertain the best mode of treatment in these patients.

Keywords: Troponin; Biomarkers; Intensive Care; Myocardial Infarction.