Abstract
Abstract Objectives Multisystem inflammatory syndrome in children (MIS-C) is a post Severe Acute Respiratory Syndrome Coronavirus2 (SARS CoV2) immune dissonance seen in the pediatric population. The current study is an attempt to understand the subtleties of diverse phenotypes, immunotherapeutics, and short-term outcome parameters of MIS-C. Materials and Methods Children admitted to the pediatric intensive care unit (PICU) between 1 month and 18 years, satisfying MIS-C criteria, were enrolled in this retrospective observational study. They were stratified into different phenotypes like shock, Kawasaki disease, and nonspecific phenotypes. Respiratory, vasoactive support, and outcomes were analyzed using appropriate statistical methods. Results Seventy-five children presented with MIS-C during the study period. The mean age was 66 months with 54.6% females. Coronavirus disease (COVID) antibody was positive for 41 (54%), real time-reverse rranscription polymerase chain reaction (RT-PCR) positivity was positive in 16 (21.3%), and rapid antigen test was positive in 10 (13%). Common symptoms included fever (100%), rash (30%), conjunctival congestion (29.7%), and cardiovascular (68% with shock) involvement. Notable differences in shock phenotype were identified including Pediatric Risk of Mortality III score, inflammatory markers, cardiac involvement, need for inotropes, and ventilation. In total, 32% received intravenous immunoglobulin and 48% glucocorticoids. The overall mortality in children with MIS-C was 9 (12%). The need for mechanical ventilation (odds ratio 10.94, confidence interval [2.06, 58.06], p-value <0.005) was noted as an independent predictor of mortality by logistic regression. Conclusion MIS-C showed a significant cardiovascular involvement at presentation, necessitating intensive care and immunomodulatory therapies. There were higher odds of mortality in the ventilated cohort.
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