Acute Heart Failure in the Setting of Post-Covid MIS-C: A Case Report

Abstract

Introduction: Multi-inflammatory Syndrome in Children (MIS-C) has emerged as a rare, but severe complication of SARS-CoV-2 infection. Patients present with persistent fever, abdominal pain, diarrhea, vomiting, rash, mucocutaneous lesions, and in severe cases, shock. The diagnostic criteria are age < 21, fever, laboratory evidence of inflammation, multi-organ involvement, and a positive COVID-19 test or known exposure 4 weeks prior to symptoms onset.

Case Description: A 17-year-old female with a history of prior COVID-19 infection presented complaining of chest pain, shortness of breath, headache, and fevers with a Tmax of 105F for 4 days. The patient was hypotensive, tachycardic, tachypneic, and hypoxic. Pertinent labs included: Na 126, BUN 48, Creatinine 2.1, ALT 62, AST 86, WBC 27.4, Hg 10.5, Troponin 0.96, Lactate 3.3, CRP 60, ESR 85, Procalcitonin 75, D-dimer 2.02, Fibrinogen >1000, COVID PCR negative, and COVID Ig-G reactive. CT chest was notable for bibasilar pulmonary opacites, cardiomegaly, and bilateral pleural effusions. Echocardiogram showed left ventricular ejection fraction of 21% and global hypokinesis. She was ultimately intubated due to respiratory failure and started on milrinone and vasopressors. She was treated with IVIG, aspirin, and methylprednisolone for MIS-C. She clinically improved and repeat echo showed an improved EF of 57% and was discharged after 10 days with a prolonged prednisone taper.

Clinical Significance: The incidence of MIS-C is 316 per 1 million pediatric SARS-CoV-2 infections. This case demonstrates need for increased awareness of potential acute cardiac failure in adolescents with a recent history of COVID-19 infection, elevated inflammatory markers, and signs of multi-organ failure so that IVIG, aspirin and corticosteroids can be started immediately to avoid progression of MIS-C into acute cardiac failure.

Conclusion: Pediatric presentation of SARS-CoV-2 infection can be mild, but there is a subset of patients that have been reported to develop MIS-C, a more severe post viral syndrome.