Second Dose of COVID-19 Vaccine Linked to Heart Inflammation in Males

Highlights:

Some parents are reluctant to vaccinate their children against COVID-19 due to the risk of mRNA vaccine-associated myopericarditis
Myopericaditis is a condition that presents itself as an inflammation of the pericardium (fluid-filled sac around the heart) and heart muscle
Myopericarditis in adolescents and young adults associated with the COVID-19 mRNA vaccine has a low incidence rate and generally favorable early outcomes

The incidence of myopericarditis was higher in males after the second dose of the COVID-19 vaccine, according to a meta-analysis of 23 studies, including 854 patients with mRNA vaccine-associated myopericarditis (rare acute heart inflammation), aged 12 to 20 years. It should be noted, however, that the overall number of cases is very low.

The results, which were reported in JAMA Pediatrics, a publication of the JAMA Network, point to relatively low incidence rates and favorable outcomes of COVID-19 vaccine-associated myopericarditis in young adults.

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‘COVID-19 vaccine-associated myopericarditis often had a mild clinical course, with symptoms fully resolved and LV systolic dysfunction returning to normal within a few days of presentation.’

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Incidence of mRNA COVID-19 Vaccine-Associated Myopericarditis

“This systematic review and meta-analysis found low incidence rate and largely favourable early outcomes of COVID-19 mRNA vaccine-associated myopericarditis in adolescents and young adults from a wide range of populations. These findings are reassuring but continued follow-up is warranted,” the researchers noted.

The incidence of myocarditis, pericarditis, or myopericarditis is two to threefold higher after a second dose of the Moderna Spikevax COVID-19 vaccine compared to the Pfizer BioNTech COVID-19 vaccine, according to a study published last month in the Journal of the American College of Cardiology.

Overall incidences of heart inflammation following either immunization, it was noted, are quite rare.

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What is Myopericarditis

Myopericarditis, a rare but serious adverse event associated with the mRNA-based COVID-19 vaccine, has been reported globally since the emergency use was authorized, particularly in adolescents and young adults.

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Outcome of COVID-19 Vaccine-Associated Myopericarditis

According to a recent JAMA study by Jun Yasuhara of Nationwide Children's Hospital in Columbus, Ohio, and Toshiki Kuno of Albert Einstein College of Medicine in the Bronx, New York, the clinical course of COVID-19 vaccine-associated myopericarditis in adults was typically mild, with complete resolution of symptoms and LV systolic dysfunction at presentation normalized within a few days.

“Importantly, the risk of developing myocarditis after SARS-CoV-2 infection is significantly higher than after COVID-19 mRNA vaccination,” they noted.

The JAMA study concluded that the advantages of the mRNA COVID-19 vaccine were assessed to exceed the potential hazards.

According to the study, vaccine hesitancy is still significant. Some parents are reluctant to vaccinate their children against COVID-19 even though there are no significant side effects typically linked to COVID-19 mRNA inoculation.

Source-Medindia

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