Abstract 16918: COVID-19 Associated Acute Myocardial Injury With Prolonged Troponin Elevation
Introduction: Acute myocardial injury in the setting of COVID-19 has been well described and is associated with higher mortality. Hypothesis: Myocarditis has been reported as a rare cause of myocardial injury in at least seven recent case reports. Methods: A 70-year-old man with coronary artery disease status post bypass surgery with recent hospitalization for left shoulder septic arthritis with MSSA bacteremia was readmitted 10 days later with a positive PCR test for SARS-CoV-2 at a local nursing facility. His symptoms were dyspnea, chest pain, fever, nausea, and diarrhea. Previous hospitalization he underwent evaluation for chest pain with cardiac catheterization revealing ejection fraction (EF) of 45% and patency of all three grafts. Results: Laboratory investigation showed elevated markers of myocardial injury with high sensitivity troponin I (hs-TnI) of 17,643 ng/L and B-type natriuretic peptide of 2,627 pg/mL, elevated C-Reactive Protein, D-dimer, and sedimentation rate. Chest X-ray showed hazy opacity in the infrahilar right lung. ECG notable for a first degree AV block with no ST-segment elevation. Transthoracic echocardiogram (TTE) showed an EF of 20% with global left ventricular dysfunction with hypokinesis of the right ventricle. No evidence of pericardial effusion. Blood cultures were negative. Management of heart failure led to clinical improvement. Over the next three months, Hs-TnI level stayed elevated at 11,339 ng/L for four weeks and trended down to 6,791 ng/L. The patient was seropositive for COVID-19 IgG eight weeks after the diagnosis of COVID-19 was made. Conclusions: We report the first case of COVID-19 related myocardial injury with prolonged and extreme troponin elevation. Recent favorable cardiac catheterization further supports immune mediated myocarditis over ischemic cardiomyopathy. Unfortunately, no endomyocardial biopsy has been performed.