Prevalence and clinical outcomes of myocarditis and pericarditis in 718,365 COVID-19 patients

Benjamin J R Buckley, Stephanie L Harrison, Elnara Fazio-Eynullayeva, Paula Underhill, Deirdre A Lane, Gregory Y H Lip

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70 Citations (Scopus)

Abstract

Background: COVID-19 has a wide spectrum of cardiovascular sequelae including myocarditis and pericarditis; however, the prevalence and clinical impact are unclear. We investigated the prevalence of new-onset myocarditis/pericarditis and associated adverse cardiovascular events in patients with COVID-19. 

Methods and Results: A retrospective cohort study was conducted using electronic medical records from a global federated health research network. Patients were included based on a diagnosis of COVID-19 and new-onset myocarditis or pericarditis. Patients with COVID-19 and myocarditis/pericarditis were 1:1 propensity score matched for age, sex, race and comorbidities to patients with COVID-19 but without myocarditis/pericarditis. The outcomes of interest were 6-month all-cause mortality, hospitalisation, cardiac arrest, incident heart failure, incident atrial fibrillation and acute myocardial infarction, comparing patients with and without myocarditis/pericarditis. 

Of 718,365 patients with COVID-19, 35,820 (5.0%) developed new-onset myocarditis and 10,706 (1.5%) developed new-onset pericarditis. Six-month all-cause mortality was 3.9% (n = 702) in patients with myocarditis and 2.9% (n = 523) in matched controls (p <.0001), odds ratio 1.36 (95% confidence interval (CI): 1.21–1.53). Six-month all-cause mortality was 15.5% (n = 816) for pericarditis and 6.7% (n = 356) in matched controls (p <.0001), odds ratio 2.55 (95% CI: 2.24–2.91). Receiving critical care was associated with significantly higher odds of mortality for patients with myocarditis and pericarditis. Patients with pericarditis seemed to associate with more new-onset cardiovascular sequelae than those with myocarditis. This finding was consistent when looking at pre-COVID-19 data with pneumonia patients. 

Conclusions: Patients with COVID-19 who present with myocarditis/pericarditis associate with increased odds of major adverse events and new-onset cardiovascular sequelae.

Original languageEnglish
Article numbere13679
Number of pages7
JournalEuropean Journal of Clinical Investigation
Volume51
Issue number11
Early online date18 Sept 2021
DOIs
Publication statusPublished - Nov 2021
Externally publishedYes

Keywords

  • cardiovascular sequelae
  • COVID-19
  • MACE
  • myocarditis
  • pericarditis

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