The ratio of cardiac troponin T to troponin I may indicate non-necrotic troponin release among COVID-19 patients.

Background: Although cardiac troponin T (cTnT) and troponin I(cTnI) are expressed to similar amount in cardiac tissue, cTnI often reach ten-times higher peak levels compared to cTnT in patients with myocardial necrosis such as in acute myocardial infarction (MI). In contrast, similar levels of cTnT and cTnI are observed in other situations such as stable atrial fibrillation and after strenuous exercise.

Objective: Examine cTnT and cTnI levels in relation to COVID-19 disease and MI.