IL6 and pericardial effusion: In this regard, the presence of left ventricular dysfunction, coronary abnormality or pericardial effusion, in addition to alterations of laboratory tests (C-reactive protein, procalcitonin, IL-6, ferritin, D-dimer, troponin, liver transaminases, lactate dehydrogenase) and the rapidity of their modifications over time, can facilitate the choice of the most appropriate care setting [84,166,172].