Study of Myocarditis in Adolescents From mRNA COVID Vaccines

mycarditis pediatrics


This study aimed to characterize the clinical presentation, short term prognosis, and myocardial

tissue changes associated with acute myocarditis following COVID-19 vaccination in the

pediatric population. 


In this retrospective multicenter study across 16 US hospitals, patients <21 years of age with a

diagnosis of myocarditis following COVID-19 vaccination were included and compared to a

cohort with the multisystem inflammatory syndrome in children (MIS-C). Younger children with

vaccine-associated myocarditis were compared to older adolescents. 


63 patients with a mean age of 15.6 years were included. 92% were male. All had received an

mRNA vaccine and, except for one, presented following the 2nd dose. Four patients had

significant dysrhythmia. 14% had mild left ventricular dysfunction on echocardiography which

resolved on discharge. 88% met the diagnostic cardiac magnetic resonance (CMR) Lake Louise

criteria for myocarditis. Myocardial injury was more prevalent in comparison to MIS-C patients.

None of the patients required inotropic, mechanical, or circulatory support. There were no

deaths. Follow-up data obtained in 86% of patients, at a mean of 35 days showed resolution of

symptoms, arrhythmias, and ventricular dysfunction. 


Clinical characteristics and early outcomes are similar between the different pediatric age

groups. There is evidence of myocardial inflammation and injury following mRNA COVID-19

vaccination as seen on CMR. The hospital course is mild with quick clinical recovery and

excellent short-term outcomes. Close follow up and further studies are needed to understand the

long-term implications and mechanism of these myocardial tissue changes 

Popular Posts (Last 30 Days)


Activist ADE Advertising Air Quality Alchohol Antibody Antitrust Apple Apps Arizona Astra Zeneca Australia Bankruptcy Banks Banned Bars BBB Beaches Bell's Palsy Ben Shapiro Biden Big Pharma Big Tech Bill Gates BioNTech Blackmail Booster Business California Canada Cares Act CDC Censorship Chart Children China Class Action Clinical Trials Closures CNN Comirnaty Contact Tracing Corruption COVAX Cover Up Cuomo Data Deaths DeSantis Doctor Reiner Doctors DOJ Dominion Dr Reiner Dr Shiva Drugs ECDC Education Election Elon Musk Email Enforcement Europe Extortion Facebook Fake Laws Fake News Fake Tests Fake Vaccine False Positive Famotidine Fauci FBI FDA Fear Mongering Federal Reserve Feds Fines Florida Flu Flu Shots Fox France Fraud Free Speech Freedom FTC Gavin Newsom Geert Vanden Bossche Genome Glenn Beck Globalism Google Government Guillain-Barré Halloween Harvard Health Health Department Healthcare Heart Herd Immunity Hero Hospitals How To Humor Hydroxychloroquine Hypocrisy India Insurance Investment IRS Israel Italy Ivermectin J&J Japan Jeff Bezos Jobs Joe Rogan LA County Larry Elder Lawsuits Leadership Let Them Breathe Lies Loans Local Laws Lockdown Los Angeles Mandates Map Masks Media Medicaid Melatonin Mental Health Michigan Microsoft Minnesota Moderna Money Montana mRNA Mutation Myocarditis Nashville Natural Immunity New Jersey New York New Zealand Nextstrain NFL NIH Nursing Homes NY NY Post Ohio Opinion Opposing View Oppression Outdoors Parks Passport Patents PCR Pennsylvania Peter McCullough Pfizer Phishing Placebo Pneumonia Politics Poll Pollution PPP Prevention Pro Choice Project Veritas Protest Racism Rand Paul Real Estate Refuse Regeneron Relief Checks Remdesirvir Restaurants Restraining Order Robert Malone Rudy Giuliani Rumble Russia Safegraph SBA Scams Schools Science Scott Gottlieb Senate Seniors Side Effects Sidney Powell Social Distancing South Korea Spain Sports Stadiums Stakeholder Capitalism Stay at Home Study Substance Abuse Surveillance Sweden Swine Flu Symptoms Taxes Teachers Technology Testing Texas Tips Tom Cotton Tony Bobulinski Transmission Treatment Trojan Horse Trump Tucker Carlson Twitter Tyranny UK Unemployment United Nations Vaccine VAERS Video Vietnam Vitamin D Warren Buffett Washington WEF Whistleblower WHO Wisconsin Women Workers Comp Zinc